助动词后面才跟动词原形,而Have是实义动词,是过去完成时的标志.这个可以在GOOGLE或者牛津词典里有详细的解释.
例如,像I did`n finish my homework.finsh 变成了原型,为什么I have`t clean
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相关问题
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I have to finish my homework first _____ cleaning up the roo
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I have _____(finish) my homework.
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---I have finshed my homework ,let’s watch the program I AM
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Mum,I won't go to bed_____I have finished my homework
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I (have finished) my homework now.
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现在完成时问题 快来I finished my homework和I have finished my homework
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I _______ ( finished / didn’t / finishes ) my homework until
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i haven't finished my homework_________.
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I have some problem (finish) my homework
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---I have finished my homework already, mum.