Hi
Are the red sentences synonymous and equally natural?
A - Until what time are you free?
B - I am free until 8. Then I have a class.
A - By what time are you free?
B - I am free until 8. Then I have a class.
A - Until when are you free?
B - I am free until 8. Then I have a class.
Thanks,
Tom
Only the first is (barely) acceptable. A is aware that B will be busy later on. Native speakers will ask: When are you available ...
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Only the first is (barely) acceptable.
A is aware that B will be busy later on.
Native speakers will ask: