一道英语选择题A lot of buildings _ and the place _ very noi

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/16 06:49:11

一道英语选择题
A lot of buildings _____ and the place _____ very noisy ever since we moved here.
A. have been built; has become B. have been built; became
C. were built; has become D.were built; became
答案是A 第二个空格不明白,从句“since we moved here”它前面不应该是过去完成时吗?更不能理解的是它的“become”居然是原型的.到底是为什么呀?

since引导的是时间状语从句,一般从句用一般过去时态,但是,主句需要用现在完成时态
since是现在完成时态的一个标志
所以,整个句子应该用现在完成时态
另外,现在完成时态的格式是have/has+过去分词
build的过去分词是built
become的过去分词是become
肯定对

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