... clause if clause Ex: I will buy a house if I have money Main clause If clause (if I have money, I will buy a house ) If clause Main clause -Mệnh đề if đứng trước sau mệnh đề Nếu mệnh đề if đặt ... the baby up If you don’t keep silent , you will wake the baby up Stop talking or you won’t understand the lesson If you don’t stop talking , you won’t understand the lesson If If If I don’t know ... prison Task : Use the correct verb tenses : will give If I see him , I (give ) him a gift would type If I had a typewriter, I (type) it myself If I had known that you were in hospital, I would have...