nothing but 前有助动词do but 后要加to 我怎么记得是实意动词do才不要加to 我从老师那里听到两个版本`~

nothing but 前有助动词do but 后要加to 我怎么记得是实意动词do才不要加to 我从老师那里听到两个版本`~ do nothing but good can do nothing but do NOTHING BUT 后面的动词是ING还是TO DO的形式? I can do nothing but nothing but 后是动词原形吗 Whom do you meet?Who meets you?为什么一个有助动词一个没有 there is nothing to do but to do 还是there is nothing to do but do “but”用法.我们说“but”前有实义动词do时,其后的不定式省去“to”.请比较：1、I did nothing but watch TV last night.2、The doctor told him nothing but to stop smoking. But have 《Nothing》 to do with you but have nothing to do with you people can do nothing but wait 翻译 now we can do nothing but waitting She could do nothing but ____(cry) Nothing but tears.I can do anyting! 句首有助动词,后面动词必须都原形么?Do you,Can you,Would you,只要句首有助动词,这句话后面所有动词都必须用原形吗?无论2个,3个还是4个. but后面要跟to do sth 省略to 的情况是BUT前有DO 或do的任何时态,do是不是非要是实意动词? I can do nothing for them except to send them money,为啥不省to?expect前明明有do“当介词but和except前面出现动词do(包括does,did,done等变化形式)时，其后用作宾语不定式通常省略不定式符号to。”书上这样说