didnot和couldnot意思一样吗

Question

如题所述

Answer 1

did not 过去没有干。。。
could not过去不能干。。。追答

I did not try to fix it because I could not do it.
我没试着修理它是因为我根本就不会修。

Answer 2

不一样，参照cannot和donot