什么情况下要加to答:help sb. do sth / help sb. to do sth. 通常情况下是通用的, 没有大的区别.唯一的区别在于: +to 表示间接帮助; 不+to, 表示直接帮助 to的用法 一:表示相对,针对 be strange (common, new, familiar, peculiar, distinct, sensitive, immune, vulnerable, indispensable) to Air is ...
什么词后面要加to?答:要分为介词to 和不定式符号to 1.介词to 有look farword to ,devote to ,get down to ,the key to ,make contributions to ,contribute to 2.动词不定式符号to 有offer to do,decide to do,hope to do, manage to do, stop to do, need to do, would like to do, want to do, ...