作业帮The population_very fast_four hundred years.
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The population_very fast_four hundred years.
A grew,in the past B grew,for the past C has grown,in the past D has grown ,last
答案给的是C,为什么啊==
A grew,in the past B grew,for the past C has grown,in the past D has grown ,last
答案给的是C,为什么啊==
首先,第二个格字,in the past ,是完成时的提示词,因此前面就用完成时,has grown,同时排除A
B,的 for the past 400 years,就错的,要么是for 400 years,要么是since past 400 years ago,同时,也是完成时的提示词
D 的last 400 years 是过去式的提示词,可是用了完成时,因此错
再问： 但是不是 for the past+时间段，表示在过去的……时间里，last|in the past+时间段，用与现在完成时么==
再答： for the past 400 years,没错，我一开始把past 看成了last 正因为要用完成时，可是B 用了过去式，所以B 才错
B,的 for the past 400 years,就错的,要么是for 400 years,要么是since past 400 years ago,同时,也是完成时的提示词
D 的last 400 years 是过去式的提示词,可是用了完成时,因此错
再问： 但是不是 for the past+时间段，表示在过去的……时间里，last|in the past+时间段，用与现在完成时么==
再答： for the past 400 years,没错，我一开始把past 看成了last 正因为要用完成时，可是B 用了过去式，所以B 才错
The population_very fast_four hundred years.
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