Question

have/had to 在 什么情况下 原形BE

Answer 1

have 是 拥有的意思,我有个猫,I HAVE A CAT.也可是用成 你做"过"什么 意思就是你 已经做完了 是以前的是了,HAD 是 你正在做 或者你 正想做.比如说 I HAD DONE IT,I HAD THINKING ABOUT DOING IT.