1、当Must如果当助动词用，后方加的是不带TO的不定式，must do sth。
2、如果用作名词，句型则是： must to do sth。
拓展资料
must do sth
1、We must do it whole-heartedly, not half-heartedly.
我们要全心全意地做这件事，而不是半心半意。
2、We made the decision which was right for us. Other parents must do the same
我们作出了对于我们而言正确的决定。其他父母也必须这么做。
3、We must do our work faster, and further better.
我们要把工作做得更加快一些，而且要做得更加好一些。
4、We must do everything possible to lift the siege
我们必须尽一切可能解除包围。
5、We must do everything in our power to ensure the success of the conference.
我们必须尽一切能力保证会议圆满成功。
must to do sth
1、At that time, washing hair was a thing I must to do.
在那个时候，洗头发是一件我必须做的事情。
2、We must to do fine-analysis for understanding of the utility logos of S& T, at the same time we should introduce more philosophy thought in it.
对科技规划功利性理念的理解要做精细化分析，同时需要引入更多的哲学思维。
3、As all other new things, the theory of the new building form does not appear, so the theoretical study about the new building form which have close relationship with the masses must to do immediately.
正如所有其它新生事物一样，有关这一新的建筑形式的相关理论研究还没有出现，因此对于这一与群众关系密切新的建筑形式的理论研究迫在眉睫。
4、The long-range goal must be to do away with nuclear weapons altogether.
远期目标必须是将核武器尽数销毁。
5、That's what your must learn to do again when you are learning a foreign language.
这是你在学习一门外语时必须要重新学会做的。
