题目内容
14.Justinhas never met(never meet) any aliens so far.分析 Justin到目前为止从未见过外星人.
解答 答案是has never met.本题考查语境中选用恰当的动词时态.so far表示"到目前为止",是与现在相联系的段时间,必须与现在完成时连用;主语为第三人称单数,助动词用has,故答案是has never met.
点评 本题是要求用所给动词的适当形式填空,解题时首先考虑句中需要的是谓语动词还是非谓语动词;其次,如果是谓语动词关注时态、语态和数的变化;如果是非谓语动词要联系非谓语的基本用法判断非谓语的形式.
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