He did nothing but do homework at home last night.为什么是do

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He did nothing but do homework at home last night.为什么是do
He did nothing but do homework at home last night.为什么是do

He did nothing but do homework at home last night.为什么是do
不定式在介词but,except,besides后面时,如果介词之前为do的某种形式,则后接不带to的不定式.

do nothing but do
can't do but do
can't choose but do
can't but do
以上都是固定搭配 but 后面只能用do 意思是“别无选择只能...”

固定句型 but后选原形。记住这个就行

因为but后面加原形
希望对你有帮助哦~