英语翻译1 我还有3道数学题 没做完 / 没去做 （意思不一样）2 我 还有很多工作 / 还有3件事 没做完3 你做完了

I have three math questions left to do/undone/havn't finished yet.
I have a lot of work to do/ three things to do
How many math problems/things have you finished?
I have finished three math problems/ done three things.

1 I have 3 math problems did not finish / not to do
2 I have a lot of
work / there are 3 things did not finish
3 have you finished a few math
problem? / a few things?
4 I have done 3 math / done 3 things

(1 )I haven't finished my three math problem/not to do
(2) is not the same as I have a lot of work/there are three things haven't finished
(3) you finished a few math problem? / a couple of things?
(4)I have finished three math problem/finished three things