0) I eat if i'm hungry

1) I'll eat if i'm hungry

2) I would eat if i was hungry

3) I would eat if i wasn't hungry

2.Passive voise 

1) He eats meat.The meat is eaten.

2) He is eating meat.Meat is being eat

3) He has eat his meat.Meat has been eaten

3.Direct and reported speech

1) I'm eating meat now.Somebody  said he was  eating meat  thean

2) I eat meat every day.Somebody said he eat meat every day

3) I eat meat yesterday .Somebody said he has eat meat  yesterday

4) I  have eat meat for times a day.Somebody said he had eaten meat six time a day

5)I can eat meat.Somebody said he could eat meat