by seven o'clock是7点之前还是之后

Question

如题所述

Answer 1

by seven o'clock 至7点钟止
by引导时间状语表示“到……时为止”，用完成时态，比如;
I have gone over five lessons by two o’clock.
到两点为止我已经复习了五课内容。

Answer 2

不是之前，也不是之后，而是刚好7点

Answer 3

by seven o'clock
七点之前,表示一段时间,多见于完成时

Answer 4

by seven o'clock 七点刚刚好