BE动词后加to dou 还是doing 啥情况下

BE动词后加to dou 还是doing 啥情况下 be hard后加to do 还是加doing be different from后加to do 还是doing be ashamed to后加do 还是doing addict oneself to后可以加动词吗 如果可以,加do还是doing addict oneself to等于be addicted to吗 后加to doing的英语动词 there be后加动词的用法there be something+ 动词,当动词和前面的主语是被动关系时,是用doing还是done ? 例:there are so many problems (remaining/remained) to be settled. i am sorry后动词加to do还是doing同标题 Cause 后加动词的哪种形式?to do,doing 还是do 英语be加形容词 动词be+形容词后用动词什么形式?be busy doing sth/be hard to do 何时用不定式 何时用动名词 动词短语后应该加什么词性的词?如：go off 后加doing 还是to do deserve后加doing还是to do? subscribe to后加doing还是do never后加doing还是to do enough后加doing还是to do choose后加to do还是doing suggest 后加doing 还是to do due to 后加do还是doing