LiuJing
Member
- Joined
- May 30, 2010
- Member Type
- Interested in Language
- Native Language
- Chinese
- Home Country
- China
- Current Location
- China
I knocked on the door for five minutes until someone answered it.
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Two questions if I am allowed to ask.
1---- Is the 'on' optional?
2---- Can the 'until' be replaced with 'before'?
Thank you.
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Two questions if I am allowed to ask.
1---- Is the 'on' optional?
2---- Can the 'until' be replaced with 'before'?
Thank you.