1 If my brother is in trouble

2 I will stay at home tomorrow

3 she would not be so stout

4 if you did not smoke too much

5 If he had learnt the poem

6 I would translate this text

7 If i was a musician

8 If Barbara had got up at half past eight

9 it would not have got broken

10 if he came to my place

Это условные предложения(умовні/conditional), их можно различить по второй части предложения, здесь были задействованы такие условия:

First Conditional

If + Present Simple,   + Future Simple

Second Conditional

If + Past Simple,    + would(should/could) + infinitive

Third Conditional

If + Past Perfect,    + would + have + V3/ed