动词不定式to后是直接加relax还是relaxed

动词不定式to后是直接加relax还是relaxed regret to do want to do这类动词后加to do的 是动词短语 还是动词不定式短语 动名词与动词不定式动名词是动词后加ing ,动词不定式是动词后加to, 英语非限定动词 包括 动名词 分词 以及不定式动词加ing 和动词加ed 后还是动词, 但不定式 to +动词原形为什么也算动词? want后面一般都加什么,+动词不定式,直接+宾语I want to go to schoolI want you还有那种形式?want的结构是这样吗：后+动词不定式,后直接+宾语 understand后加to 动词原形还是动词过去式,还是直接加动词ing. be sure to后面是加名词还是动词啊 这个to是介词还是不定式? want是加动名词还是动词不定式动名词是加to do sth 不定式是doing sth how do you like后加动名词还是动词不定式? 哪些动词后接不定式不加to 动词不定式不加to 直接引语转成间接时,是不是除了真理不变外,引导词后动词全是过去式把直接改间接后,The teacher told me that I must relax myself中放松relax为什么不加ed? settle down怎样加动词?settle down to中的to是介词还是和后面动词组成不定式结构? 动词不定式 与 toto好像说的是动词不定式后加 但是我至今搞不懂动词不定式是什么 be supposed to do sthbe supposed to 加动词原形,还是be supposed 加动词不定式 动词不定式包括to 例如：The only person I have ever known to have a skeleton in the cupboard..这句话know后的to是独自做宾语+动词不定式.还是动词不定式是to have a skeleyon. 动词不定式包括to 例如：The only person I have ever known to have a skeleton in the cupboard..这句话know后的to是独自做宾语+动词不定式?还是动词不定式是to have a skeleyon? study加动词ing还是动词不定式