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

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~