介词可以修饰副词吗

He wanted to have a source of income after his retirement; until then, he wouldn't require additional money...

until then成分怎么判断呢？

这里的then为名词，作介词until的宾语。

then n. [作介词的宾语]那时《现代英汉综合大词典》

since then; till then; before then...

▲now也可以用作名词。如：

by now； till now; for now

曾克辉 -

擅长：英语考试 | 采纳率 54% | 回答于 1秒前

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