Do these sentences sound natural???

Do these sentences sound natural???

Crowd can be singular here.  It means a big group of people. Use plural if you mean more than one group of people.

3. I got the impression (that) she wanted to be alone. ( Or I got the feeling that she wanted to be alone?) 

or say it in present 

I get the impression(that) she wants to be alone. 

4 We stopped on the way to buy some breakfast, so it took us for a while.
5. If you can get some time off work, we can finish decorating tonight.

Do these sentences sound natural???

1. a) I can never get her to myself OR I can't ever get her to myself.  "Can't" and "Never" are both negatives, so if you put them together it creates a positive (like in math). You need to put a positive with a negative to keep the sentence in the negative form. "Can never" or "Can't (cannot) ever". 
    b). Punctuation: because this sentence can be split into two sentences without changing anything, you should use a semicolon ( ; ) in place of the comma. ex.: I can never get her to myself; she always has so many people with her.  OR you could use the word "because" in place of the semicolon. ex.: I can't ever get her to myself because she always has so many people with her.

2. This sentence is correct as written.

3. Both of these sentence options are correct, and both are used interchangeably.

4. Leave out the "for".  We stopped on the way to buy some breakfast, so it took us a while. OR You could say: We stopped for a while to get breakfast.

5. The end of this sentence confused me a little bit, so I'll give you two examples of what I think you might mean.
    a) If you can get some time off work, we can finish our decoration. This is when you are working on one decoration (a picture, for example).
    b) If you can get some time off work, we can finish decorating. This is like decorating a room, or a building. (for a party or a celebration, for example.)