his uncle ______ posted the photos to him ______.
析:already常用在肯定句中,yet常用在否定句、疑问句中,故填hasn't, yet。
3. -ann has gone to shanghai. -so ______her parents. a. has b. had c. did d. have
析:"so+助/系/情态动词+主语"结构中的动词形式应与前句结构中动词形式保持一致,又后句的主语为her parents是复数,故选d。
二、考查其用法与标志词
(一)当句中有never, ever, just, already, yet, before等时,常用现在完成时。如:
1. -mum, may i go out and play basketball? -______you______ your homework yet?
a. do; finish b. are; finishing c. did; finish d. have; finished
2. -______ you ______anywhere before? -yes, but i can't remember where i______
a. did; surf; surfed b. have; surfed; surfed
c. did; surf; have surfed d. have; surfed; have surfed
析:据yet和before可知,应用现在完成时,故1题选d,2题选d。
(二)当句中有"for +段时间"或"since +点时间"等时,主句常用现在完成时,谓语动词必须是延续性动词,若是非延续性动词,要改为延续性动词或表状态的词(短语)。如:
1. his brother has been to stone forest twice______he came to yunnan.
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