i (send) an e-mail to her once a week since i left her city将括号里单词的正确形式填在空里空在 send 前面
问题描述:
i (send) an e-mail to her once a week since i left her city
将括号里单词的正确形式填在空里
空在 send 前面
答
have sent
现在完成式
since,自从的意思.看到这个字基本上都会是现在完成式