如,Do you know if he will come back next month?if he comes back,please let me know?语法点是什么?
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如,Do you know if he will come back next month?if he comes back,please let me know?语法点是什么?
如,Do you know if he will come back next month?if he comes back,please let me know?语法点是什么?
如,Do you know if he will come back next month?if he comes back,please let me know?语法点是什么?
if 的两种用法:
1 “是否”,用于引导宾语从句.第一句:“你知道他下个月是否回来吗?”.因为是下个月发生的事情,所以,宾语从句用一般将来时.
2 “如果”,引导条件状语从句.第二句:“如果他回来,请让我知道.”在条件状语从句中,用现在时表示将来,也就是说:主句用将来时,从句用现在时.即【主将从现】.
希望我的回答能够帮到你,
前者‘if“ 是 “是否”的意思,引导宾语从句,后者是如果,引导条件状语从句~!
do you know if he will come为什么if后面用将来时如题,急
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