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ããI haven't seen much of him recently (lately).
ããWe have seen that film before.
ããHave they found the missing child yet?
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ããPeter has written six papers so far.
ããMan has now learned to release energy from the nucleus of the atom.
ããThere has been too much rain in San Francisco this year.
ããThe friendly relations and cooperation between our two countries have been enhanced in the past few years.
ããUp to the present everything has been successful.
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温馨提示:答案为网友推荐,仅供参考
第1个回答 2012-10-03
现在完成时,表示的是刚刚、现在完成的事情,所有的动词必须是有时间可持续性的。。。可以根据表达的需要挑选不同的动词
第2个回答 2012-10-04
讲得很详细了,也就这些