Knocking signals that someone wants attention at a door.
The idea
Use knock on or knock at a door. The past is knocked; a knock is also the sound.
Examples
- Please knock on the door first.
- Someone is knocking at the back door.
- We knocked twice and waited outside.
- She heard a knock during dinner.
- He opened the door after the knock.
- If you hear a knock, say come in.
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Watch out
Do not omit the preposition before the door: say knock on the door.
Try it yourself
Choose the best answer. Please knock ___ the office door. (on / to)
Show answer or example answer
on
on connects the action to the door.
Choose the best answer. Yesterday they ___ at the door. (knocked / knock)
Show answer or example answer
knocked
knocked places the action yesterday.
Choose the best answer. You hear a visitor. Invite them inside: ___ (Come in / Go away)
Show answer or example answer
Come in
Come in invites the visitor to enter.
Practice round
Answer questions and rebuild English sentences to practise. Your score is shown.
Choose the best answer. Please knock ___ the office door. (on / to)
Choose the best answer. Yesterday they ___ at the door. (knocked / knock)
Choose the best answer. You hear a visitor. Invite them inside: ___ (Come in / Go away)
Tap the words in the right order.
Tap the words in the right order.
Tap the words in the right order.
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Describe a visitor knocking and your response.