英语语法问题Icouldn'tbutlaugh.是Icouldn'tdoanythingbutlaugh.的缩写,那么Icouldn'thelpbutlaugh.是哪个句子的缩写?

Question

英语语法问题
I couldn't but laugh.是I couldn't do anything but laugh.的缩写,那么I couldn't help but laugh.是哪个句子的缩写?

Answer 1

can't /couldn't but do sth= can't /couldn't help but do sth 【英语口语惯用语】
只得做某事；不得不做某事
can't /couldn't help do sth 不能帮助做某事
can't /couldn't help doing sth 不由自主做某事；情不自禁做某事
例如：
I can't help but go there alone.
Sorry,I can't help clean the floor.
Hearing the funny story,all of them couldn't help laughing.
祝你开心如意!