knock at an open door in English

seek entrance at a door that is already open; work hard in vain, work hard without results

Use "knock at an open door" in a sentence

1. There was a knock on / at the door.

2. At the Threshold of an Open Door

3. Did I hear a knock at the door?

4. There was a treble knock at the door.

5. There was an insistent knock on my door.

6. They were interrupted by a knock at the door.

7. She hurried to answer the knock at the door.

8. Just then there was a knock at the door.

9. 10 There was an insistent knock on my door.

10. The outer door was open this time and a sonorous voice responded to his knock.

11. 23 minutes to door knock.

12. Please knock on the door.

13. Just at that moment there was a knock on the door.

14. It sounds as though there is a knock at the door.

15. I was awoken from my dream by a knock at the door.

16. His hands and voice could, at any moment, knock and beckon at my door.

17. There's a knock on the door.

18. They were awoken from their slumber by a knock at the door.

19. Her gentle knock on the door.

20. The dog's ears perked up when hearing a knock at the door.

21. A loud knock shook my front door.

22. Hallelujah , we have an open door!

23. I had Barely sat down when there was a knock at the door

24. Knock on the door before you enter.

25. Hesitating, Eline pushed open the door, it seemed fatuous to knock, a foolish act of politeness in the circumstances.