11.

1.If it rains, he will stay at home.

2.In two days, I will know my results.

3.I think he won't come back his hometown.

4.I will finish my report in 2 days.

5.We believe that she will recover from her illness soon.

12.

1.Will take

2.Will visit

3.Will go

4.Will you take part

5.Will cook

6.Isn't going to go

7.Will have

8.Will Emma take part

9.Will come

10.Isn't going to go

11.Will watch

12.Will we take part

___________________________________
$\rightarrow$ S + will/shall + Vinf

$\rightarrow$ S + am/is/are going to Vinf

$\rightarrow$ Sau "think" và "promise" chia TLĐ

$\rightarrow$ If + S + Vs/es, S + will + Vinf