Conditional 1,2,3 (№2)

a. would happen   

will have happened  

would have happened

will happen

don’t disturb 

will not disturb

would not disturb

wouldn't have disturbed

will buy

bought

buys

had bought

was

were

is

had been

know

knew

had known

will know

would have made

would make

makes

will make

unless

in case

as long as

if

If I didn't look at the trees, I won't fell off the bike.

If I wasn't looking at the trees, I wouldn' t have fallen off the bike.

If I hadn't been looking at the trees, I wouldn' t have fallen off the bike.

If I don't look at the trees, I won't fall off the bike.

(I don't think I will win, because it's hardly probable.)

(It's possible in the future, I am sure)

(But I know that it is not realistic.)

(It might have happened in the past.)

(He'll probably meet her in the future.)

(He doesn't think he will meet her.)

(Unfortunately, he didn't meet her.)

If you had asked your boss, I'm sure he would have considered your proposal. 

If you didn't play the music too loud, the neighbour wouldn't have complained.

I'd set them the task if they were more reliable. However, I don't think they're capable of doing it. 

If you don't manage  to finish the catalogue on time, we'll have to postpone the printing until next month.