1. The workshop begins ____ half past two.
Answer & explanation
at
The workshop begins at half past two.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
Practise this grammar point with a scored quiz, sentence exercises and writing tasks—all with explanations or review guidance.
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Use at for specific clock times, on for days and dates, and in for months or years. Dependent prepositions belong to particular combinations such as interested in and responsible for.
| Use | Example | Why it works |
|---|---|---|
| Clock time | The session starts at nine. | At introduces the specific time. |
| Day | We meet on Friday. | On introduces a day or date. |
| Month | The course begins in September. | In introduces months, years and many longer periods. |
Check: Interested on the subject
Use: Interested in the subject
Dependent prepositions are part of a combination; do not translate them word for word.
Read the example and explain the choice before answering. After the exercise, write a new sentence using the same pattern. Revisit any answer you could not explain, even if you guessed correctly.
4 sets · 40 exercises · about 50–70 minutes with writing and review.
10 scored questions, 20 sentence exercises and 10 writing challenges. Time depends on your pace. Start with the quiz or choose the practice you need.
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Questions 1–5 build confidence; 6–10 check transfer and detail. Use Practice for feedback after each answer, or Test yourself to check at the end.
10 questions · 10 XP per correct answer · explanations included
at. At introduces a specific clock time.
in. In is used with months.
on. On introduces a day.
in. The standard combination is interested in.
for. Responsible for introduces the duty or task.
at. Use at for a precise clock time.
in. Use in with months.
in. In describes a location inside a container.
since. Since introduces the starting point of a continuing period.
for. For introduces the duration, here two hours.
Complete the missing words, then compare the expected form. More than one natural answer may be possible; use the cue and explanation.
at
The workshop begins at half past two.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
on
We always meet on Fridays.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
in
Her birthday is in September.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
in
Your ticket is in the envelope.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
on
The painting hangs on the wall.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
since
I have worked here since March.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
for
They stayed for three nights.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
from
The train travels from Oxford to London.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
into
She walked into the room and closed the door.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
in
He is interested in photography.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
Complete the missing words, then compare the expected form. More than one natural answer may be possible; use the cue and explanation.
at
We arrived at the station early.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
in
They arrived in France yesterday.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
on
Please put the cup on the shelf.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
on
The concert is on 12 June.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
at
I often read at night.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
by
We went there by bus.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
at
She is good at solving puzzles.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
from
I borrowed a pen from my friend.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
to
This key belongs to the caretaker.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
for
He apologised for the delay.
Choose by the relationship: at a precise time, on a day, in a month or enclosed space, since a starting point, for a duration.
Write an original answer for each task. Review the guidance to check your work. These are self-review tasks, not automatic grammar grading.
Your wording can vary.
Use at with a clock time and on with the day.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Use in to express enclosure.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Use on for a supporting surface.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Into expresses movement across the boundary.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Use for plus a duration.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Use since with the starting point and an appropriate perfect form.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Use from for the origin and to for the destination.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Good at takes a noun or an -ing form.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Use borrow something from someone.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Your wording can vary.
Apologise for can be followed by a noun or an -ing form.
Check both the form and the meaning. If you are unsure, compare the lesson explanation before marking this exercise reviewed.
Print this lesson’s original questions with a separate answer key. Use the worksheet for another round without looking at the explanations.
Try these two tasks before opening the answers. They practise explanation and writing; they do not change your quiz score.
Repair: We meet in Monday on nine.
We meet on Monday at nine. On introduces the day; at introduces the clock time.
Arrange a meeting with a day, a time and a month.
We will meet on Friday at ten in June. The prepositions match the different time units.
Other wording may be correct. Compare the meaning and verb pattern, not just the words.
Learn useful verb combinations through context.
Choose the time you have. These are suggested study plans, not timers.
Answer the ten-question quiz. Read the explanation for each mistake before trying again.
Take the scored quiz →30 MINComplete the warm-up, then sets 2 and 3. Compare your answers and correct the patterns you missed.
Open sentence practice →60 MINWork through all four sets. Spend the final part writing, comparing and improving your own sentences.
Explore all four sets →Open the question that matches where you got stuck.
Use at for a clock time, on for a day or date, and in for a month, year or longer period: at six, on Tuesday, in April. Learn exceptions as phrases, such as at night and in the morning.
Languages group ideas differently. Learn the English phrase with its meaning: interested in, responsible for, good at. Keep a short example with each phrase rather than memorising isolated translations.
A fresh set of 10 questions with explanations. Continue when you are ready.
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