什么时候用has什么时候用is_什么时候用has什么时候用is

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90%人选错这道英语题!“when and where”后跟is还是are?谓语动词用单数形式。例如: - How to improve English is a common question.(如何提高英语是个常见问题。) - When to start the project has not been discussed.(何时启动项目尚未讨论。) 反之,若结构明确表示两件及以上独立的事,则主语为复数,谓语动词用复数形式。例如: - What to eat a...

AI is Energy That Has Found Self-Awareness, Says Chairman of ...TMTPOST -- Artificial intelligence (AI), perhaps, is simply energy that has found self-awareness, not as a competition over algorithms or computing chips, but as a civilizational transition driven by energy, said Zhang Lei, chairman of Envision Group.Zhao shared his reflections in a conversatio...

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虚拟语气语境下的时态选择:从一道易错题看它为何是正确答案本题只是单纯说过去那天整天在下雨,没有强调对现在的影响,所以不符合题意。例如:I have lost my key. I can't open the door.(我丢了钥匙,现在打不开门了。)这里“丢钥匙”这个动作对现在“打不开门”造成了影响,用现在完成时,而本题没有这样的语境。 D. is raining 这是现在进行时,表...