to do 与 to doing作状语时的区别He has devoted his life to helping blind people .其中的to helping 可以换成 to help to do（不定式） 与 to doing（既介词+动名词）作状语的时候有什么区别?

to do 与 to doing作状语时的区别He has devoted his life to helping blind people .其中的to helping 可以换成 to help to do（不定式） 与 to doing（既介词+动名词）作状语的时候有什么区别? V-ing作结果状语与to do不定式作状语有什么区别? V-ing作结果状语与to do不定式作状语有什么区别? be going to do的句式里是不是be going作谓语,to do作状语? sb be adj to do sth.如i am happy to do this（或doing it） 这里面的不定式或分词作状语吗,做什么状语?懂的来有表语补足语这一说吗？ to be doing和to have done为什么不能作状语 report to do与report doing区别 want to do 与 want doing区别 use to do与doing的区别 to do与doing选哪个 is to do与is doing区别 doing与done作状语的区别 complete作动词后应接to do 还是 doing? advise sb to do sth.中的to do 作状语呢?还是宾补呢? bother doing /to do stop to do 与 stop doing的区别,forget to do 与 forget doing的区别 try to do 与try to doing 的区别 be used to doing与used to do的区别