“I didn't mean to”是什么意思？
mean to do 意思是打算做某事 mean doing 意思是故意做某事 所以didn't mean to是不打算做
非谓语动词（不能作谓语用）包括不定式、分词及动名词。
动词不定式
1．常用形式：一般主动式to do, 一般被动式to be done
完成主动式to have done, 完成被动式to have been done
进行式to be doing
2．语法功能：可作主语、表语、宾语、宾补、定语和状语（即除谓语之外的各种成
分）。例如：
1）主语：To master a foreign language is very important.
2）表语：My job is to drive them to the company every day.
3）宾语：Do you want to visit the Great Wall?
Can you give us some advice on what to do next?
宾补：The teacher advised us to have a rest first.
I didn´t notice them come in.
注：see, hear, watch, notice, have, make, let等动词后作宾补的动词不定式不带to, 但变为被动语态以后（即不定式作主补时）要带to, （其中let sb. do sth. 变为被动式为sb. is let do sth.）
help（帮助）后作宾补的动词不定式可带to，也可不带to. 即help sb.(to)do sth.
定语：不定式位于所修饰的名词，代词之后，如：Who was the first one to set
to the top of the hill yesterday? /He is the man to depend on/to believe in.
