If you don't help me,I won't be able to carry the box upstairs.(改为同义句)

If you don't help me,I won't be able to carry the box upstairs.(改为同义句)
If you don't help me,I won't be able to carry the box upstairs.(改为同义句)

If you don't help me,I won't be able to carry the box upstairs.(改为同义句)
I won't be able to carry the box upstairs without your help.

i can't carry the box upstairs without your help.

I won't carry the box upstairs unless you help me