not only tom but also bob has been to that island before
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not only tom but also bob has been to that island before
这句话是对的,可是before为啥这里用在完成时态呢not only tom but also bob was to that island before 实际上题目是这样的not only tom but also bob___(be) to that island before
这句话是对的,可是before为啥这里用在完成时态呢not only tom but also bob was to that island before 实际上题目是这样的not only tom but also bob___(be) to that island before
ago 通常与一般过去时连用,不能与完成时连用;before通常与过去完成时连用.
很显然 这里填现在完成时 就近原则,bob单三 填 has been to(去过某地)
你这句就不对了,原因你懂得.
祝你学习进步
再问: before也与一般过去连用啊,原因我不懂
再答: before与一般过去连用是做的是介词。 I forgot to take the key before going out yesterday(before做介词,动词用ing形式) 而这里是副词,所以用现在完成时。这也就是原因啊!
再问: 不懂啊,副词,介词什么的,我怎么知道啊,这句话的意思不是 之前去了某某地 吗, 看到你的消息了………………
再答: 那好吧 从其他角度入手 意思是之前去过(have been to去过某地)那个岛,既然是之前去的,那么就是已经完成(做过)的事了,所以就用现在完成时。 before做介词,在句中不能单独使用,所以后面必须跟一些其他的(名词、代词、动名词)连用,而做副词时,后面什么也不跟,做时间状语(和today,tomorrow,next day......一样)。 你只需记住before在句末时,一定做的副词,用完成时。
再问: 懂了,是不是before表示从前,也就是副词时,用完成时,也就是此时before是单独的时间状语, 而before当介词时,是在……以前,后面后跟一些东西,此时用过去,对吧
再答: 非常对,恭喜你学懂了
很显然 这里填现在完成时 就近原则,bob单三 填 has been to(去过某地)
你这句就不对了,原因你懂得.
祝你学习进步
再问: before也与一般过去连用啊,原因我不懂
再答: before与一般过去连用是做的是介词。 I forgot to take the key before going out yesterday(before做介词,动词用ing形式) 而这里是副词,所以用现在完成时。这也就是原因啊!
再问: 不懂啊,副词,介词什么的,我怎么知道啊,这句话的意思不是 之前去了某某地 吗, 看到你的消息了………………
再答: 那好吧 从其他角度入手 意思是之前去过(have been to去过某地)那个岛,既然是之前去的,那么就是已经完成(做过)的事了,所以就用现在完成时。 before做介词,在句中不能单独使用,所以后面必须跟一些其他的(名词、代词、动名词)连用,而做副词时,后面什么也不跟,做时间状语(和today,tomorrow,next day......一样)。 你只需记住before在句末时,一定做的副词,用完成时。
再问: 懂了,是不是before表示从前,也就是副词时,用完成时,也就是此时before是单独的时间状语, 而before当介词时,是在……以前,后面后跟一些东西,此时用过去,对吧
再答: 非常对,恭喜你学懂了
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