TO-infinitive

To 如果是做 infinitive
后面的 verb 是用 base form of verb
without special ending. The base form of the verb is the simplest form of the verb ~ the one listed in a dictionary. 例子: He wants to go. (不是 goes
going
went or gone) She decided to apply for the job. (不是 applies
applying or applied) 但是 to 除了做 infinitive 之外
还可以做 preposition
后面的 verb
变了用 verb-ing
(gerund.) 只有 verb-ing 作 noun 时
才是 gerund. 例子: I am looking forward to seeing you. (to 是 preposition
seeing 是 gerund) He is accustomed to driving at night. The Green Party is dedicated to protecting the environment. We may have to resort to using untrained staff. 问题要清楚知道 to 在句子中是做 infinitive 或 preposition. 前置词 (preposition) 后面可用 noun
noun phrase
gerund 代替. He is accustomed to the dark. 小心: She used to drive in London. (to 是 infinitive) She is used to driving in London. (to 是 preposition) 这两句子意思不同 题外: 因为 to 可以做前置词
有时后面 verb form 变了用 past participle 作 adjective. “A sermon to unconverted sinners” ~ Title (unconverted 是 past participle
used as an adjective)
TO 后面是不是永远都不变?? ANSWER:是