Chia động từ

1.if i see him ,i (give).......him a lift
2. the table will collapse if you (stand)......on it
3. if he (read).....in bad light.he will ruin his eyes
4. someone (steal)....your car if you leave it unlocked
5. what will happen if my parachute ( not open )....?
6. if it..... ( not rain )....tomorrow,we will go for a picnic