Read a simple schedule and ask when a place opens or a service leaves.
The idea
Use on with a day: on Monday. Use at with a clock time: at nine. Ask What time does the shop open? to find the opening time. Timetables can use the present simple for scheduled events: The next train leaves at ten thirty. Repeat the day and time to confirm.
Examples
- The class starts at nine.
- The library opens on Monday.
- The next train leaves at ten thirty.
- The museum is closed on Sundays.
- What time does the shop open?
- Is the office open on Friday?
Read-aloud uses a synthetic English voice on your device. Quality and availability vary; it does not assess pronunciation.
No English device voice is available. You can still read the examples.
Watch out
A day and a clock time take different prepositions in these examples: on Monday but at nine. Opening days do not automatically tell you the closing time.
Try it yourself
Choose the word for a clock time: ___ nine. (at / on)
Show answer or example answer
at
at normally introduces a clock time: at nine.
Choose the word for a weekday: ___ Monday. (on / at)
Show answer or example answer
on
on normally introduces a day: on Monday.
Ask about the opening time. (What time does the shop open? / What time does the shop close?)
Show answer or example answer
What time does the shop open?
What time does the shop open? asks for its opening time.
Practice round
Answer questions and rebuild English sentences to practise. Your score is shown.
Choose the word for a clock time: ___ nine. (at / on)
Choose the word for a weekday: ___ Monday. (on / at)
Ask about the opening time. (What time does the shop open? / What time does the shop close?)
What time does the shop open?
Tap the words in the right order.
Tap the words in the right order.
Tap the words in the right order.
Keep your progress
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Write one sentence about an opening day and one about a departure time. Then write a question to confirm an opening time.

