1) Supply the correct from of verbs to the following conditions.
a. If you boil water. It (give) up vapor
b. I (go) if I had known
c. The child (be killed) if the train hadn't stopped
d. It (be) better if they didn't come
e. If they (not play) the match the principal would be angry..
f. If I studied conditional, I (can) known it better.
g. If he (has) told the secret, other people would not suffer.