II.1 had

2 would have visited

3 attended

4 knew

5 had arrived

6 studies

7  doesn't hurry

8 see

9 speak

10 would you do

II.1 will be

2 would come

3 rang

4 would have fed

5 didn't rain

6 were

7 would have written

8 had played/would have won

9 can lend

10 did

11 isn't 

12 is

13 would build

14 gives

15 would not have had

16 writes

17 improved

18 would speak

19 would have visited

20 happened/would be

I.2 If she doesn't try she won't succeed

If she didn't try she wouldn't succeed

If she hadn't tried,she wouldn't have had succeeded

3 If I see her,I will tell her

If I saw her,I would tell her

If I had seen I would have told her

4 Will you do it if I ask you?

Would you do it if I asked you?

Would you have done it if I had asked you?

5 If I am ill I will stay at home

If I were ill I would stay at home

If I had been ill I would have stayed at home

6 What will you do if the bus doesn't come?

What would you do if the bus didn't come?

What would you have done if the bus hadn't come?

7 I will sorry if she leaves

I would sorry if she left

 I would have sorried if she hd left

8 I won't stay in this job if I can find another one

I would't stay in this job if I could find another one

I wouldn't have stayed in this job if I could have found another one

9 They will get wet if it rains

They would get wet if it rained

They would have got wet if it had rained

10 It won't bite unless you move

It wouldn't bite unless you moved

It wouldn't have bitten unless you had moved

11 We will go out unless it stops snowing

we would go out if it stopped snowing

we would have gone out if it had stopped snowing