---- you --- (finish ) your homework yet?My uncle ---- (just come) back from Japan.
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---- you --- (finish ) your homework yet?My uncle ---- (just come) back from Japan.
---- you --- (finish ) your homework yet?My uncle ---- (just come) back from Japan.
---- you --- (finish ) your homework yet?My uncle ---- (just come) back from Japan.
Have finished
has just come
Have finished has(yet表示已经,所以用完成时，这里表示至今为止有没有完成，因此是现在完成时。叔叔是第三人称，用has)
yet 是现在完成时的标志性词。看到yet。就应该想到这个句子是现在完成时。现在完成时的结构：
have/has done(done 是动词的过去分词）
Have you finished your homework yet?
my uncle has just come back from Japan. （我叔叔刚从日本回来。我没有做完作业是因为叔叔刚回来。所以，叔...
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yet 是现在完成时的标志性词。看到yet。就应该想到这个句子是现在完成时。现在完成时的结构：
have/has done(done 是动词的过去分词）
Have you finished your homework yet?
my uncle has just come back from Japan. （我叔叔刚从日本回来。我没有做完作业是因为叔叔刚回来。所以，叔叔回来对我做作业造成了影响，所以这句话也要用现在完成时。 come 的过去分词还是come. )
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