i have been there (for) three times.这句话中括号中的for一定要加吗?
问题描述:
i have been there (for) three times.这句话中括号中的for一定要加吗?
答
不用加
答
应该是的
答
i have been there (for) three times.=since three times ago.
for+一段时间 这词问现在完成的标志词.