动词不定式to do ,to是副词吗?是副词加一个动词吗?

动词不定式to do ,to是副词吗?是副词加一个动词吗? to do sth.是动词不定式吗? 请问1,所有有to do的短语都是动词不定式吗?如decide to do.2,动词不定式一定是 to do形式吗? go to school.是动词不定式吗? How to do look after you E-dog?to是动词不定式吗? I DON'T HAVE MUCH TO DO.这个TO在这里是什么意思?是动词不定式吗? 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 to不是介词吗?介词后面是不是接动名词?为什么动词不定式是动词原形呢?to do something（动词不定式）prep.+doing something what do you like to do是动词不定式吗6.what do you like to do7.i like to go shopping.8.would you like to go fishing with us?sure,i'd like to.哪些是动词不定式 be surprise to do sth是什么意思老师说to do sth是动词不定式 want to的否定是don't want to,而decide +not to do?不都是动词不定式吗? 动词不定式的否定是加not,那want to do?还有have to do,need to do? 动词to do sth 和动词不定式有区别吗 there is something to do to do是形容词还是副词这句等于是there is to do something,等于不定式to do当补语？ come together to do sth动词短语如果加副词是放在中间的吗? to do sth.是不定式吗,请问不定式到底是什么意思,什么情况下用不定式 动词+名词+to不定式+动词,那么Be动词+名词+动词也要加to不定式吗?（be动词+名词+to不定式+动词）那么动词+名词+to+动词这种表示是对的吗 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