The meeting is postponed until next week ,( )we will not be so busy 请问选择下列哪项比较合适 SINCEwhat that while 求详细解释 谢谢了

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The meeting is postponed until next week ,( )we will not be so busy 请问选择下列哪项比较合适 SINCEwhat   that    while  求详细解释 谢谢了

The meeting is postponed until next week ,( )we will not be so busy 请问选择下列哪项比较合适 SINCEwhat that while 求详细解释 谢谢了
The meeting is postponed until next week ,( )we will not be so busy 请问选择下列哪项比较合适 SINCE
what that while 求详细解释 谢谢了

The meeting is postponed until next week ,( )we will not be so busy 请问选择下列哪项比较合适 SINCEwhat that while 求详细解释 谢谢了
until可用作介词或连词,意为“到……时候为止”、“到……时候才”或“在……时候以前不”.
1.如果主句中的谓语动词是终止性动词,应采用“...not ...until ...”结构,意为“……到……时候才……”.例如:
You mustn’t eat anything until you see the doctor.看过医生之后,你才能吃东西.
2.如果主句中的谓语动词是延续性动词,那么谓语动词用肯定式或否定式,它们所表达的意思有所不同.
1) 如果谓语动词为肯定式,则until译为“到……时候为止”.例如:
I watched TV until she came back.我看电视一直看到她回来.
2) 如果谓语动词为否定式,则until应译为“到……时候才”,即“在……以前不”.如:
I did not watch TV until she came back.(= I began to watch TV when/after she came back.) 直到她回来我才开始看电视.
3.用终止性动词作谓语时,until既可以和not连用,又可以和never,nobody,nothing,few,little,seldom,hardly等含否定意义的词连用.例如:
I had not seen him until 1990.(= I had never seen him until 1990.) 1990年以前我从未见过他.
Don’t put off until tomorrow what you can do today.(= Never put off what you can do today till tomorrow.) 今日事,今日毕.

The meeting is postponed until next week ,( )we will not be so busy 请问选择下列哪项比较合适 SINCE
~没有看懂你的提问呀~有了since 就不需要 连词(what,that ,while) 呀~
Since the meeting is postponed until next week ,we will not be so busy~