题目

填空He (work) on this novel for a very long time.By the time he (finish) it,he (written) six nove
He (work) on this novel for a very long time.By the time he (finish) it,he (written) six novels.
A 1 worked 2 finished 3 had written
B 1 has been working 2 finishes 3 will have written
这两种答案,哪个对请说明一下原因,
嗯,第二个是教材的标准答案,判官解释的很清楚.
但如果用第一个能不能说的通呢,为什么

提问时间：2020-11-02

答案

你一开始就研究这么高深而且复杂的语法,真的不好弄噢~以后还是分开联系,等熟练了,再返回来把语法合起来.这样根基打好了,房子自然就稳固了,英语不是一哈就弄明白的.这句话我觉得选B1.for a long time 是一个明显的完...