If you ——time,will you send the letter for me,please.A.have B.are having C.have had

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If you ——time,will you send the letter for me,please.A.have B.are having C.have had
If you ——time,will you send the letter for me,please.A.have B.are having C.have had

If you ——time,will you send the letter for me,please.A.have B.are having C.have had
答案选A.have
条件状语从句用一般现在时态,主句用将来时态
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答案为A。
if引导条件状语从句,从句用一般现在时表示将来。

a

A,if引导的是条件状语从句,条件状语从句遵从“主句将来,从句现在”的时态。

A if做“如果”讲,引导条件状语从句,主句是将来时,if引导的从句用一般现在时表将来时