[enydia]

Hi, everyone.
I have a question on the ellipsis usage.
Take the following paragraphs for example.

This is paragraph 1.
This is paragraph 2.
This is paragraph 3.
This is paragraph 4.

If I want to omit paragraph 2, can I say:
This is paragraph 1.
...
This is paragraph 3.
This is paragraph 4.

If I want to omit paragraph 2 and paragraph 3, can I say:
This is paragraph 1.
...
This is paragraph 4.

If I want to omit paragraph 2, paragraph 3, a part of paragraph 1 and a part of paragraph 4, can I say:
This is....
...
... paragraph 4.

Thanks.