题目内容
13.I don't know if Mr.Wang ____ free.If he ____ free,he will come to our school-leavers'party.( )| A. | will be,is | B. | is,will be | C. | will is,is | D. | will be,will be |
分析 我不知道王老师是否有空.如果他有空,他会来参加我们的毕业聚会的.
解答 答案:A.有两个if,第一个if是"是否"的意思,引导的是宾语从句,根据宾语从句的时态,可知因为 if Mr.Wang ____ free是否有空,应该用将来时will be free;第二个if是"如果"的意思,引导条件状语从句,其时态应该是"主将从现",即主句用将来时,从句应该用一般现在时;结合语境,故选A.
点评 以if引导的从句有两个,一个是宾语从句,一个是条件状语从句;做题时应该首先明确它引导的是什么从句,然后根据它的时态用法,来确定选项.
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