what's the differences between ...and..还是what are the differences between...andwhat's the differences between ...and..还是what are differences between...and ...这两个哪个是正确的 还是都可以用 我去网上看了下这两种句式

what's the differences between ...and..还是what are the differences between...and
what's the differences between ...and..还是what are differences between...and ...
这两个哪个是正确的 还是都可以用 我去网上看了下这两种句式的都有
还有一个是
when can i ues the...
还是
when i can ues the...

[What's] the [difference] between...and...
[What are] the [differences] between...and...
When can I use the 是问句
When I can use the 是陈述句~