1. you are so nervous because you drink too muck coffee--> if 2. i didn't tell you because you didn't ask me---> if 3. as i haven't got money , i can't buy a new car-->if 4 i lost my watch and,as a result , we missed our plane when we went on holidays --->if 5. you introduced her to me some months ago, that's why we became friends --->if 6. i didn't buy the dress because i didn't have my credit card with me --->if 7. when you ask me for the car, i will lend it to you --->if 8. you missed the party and you didn't meet my friends 9. without the sun, we wouldn't exist--->if 10. she didn't learn mathematics , that's why she was cheated by that salesman---> if hộ mik vs ạ mik đg gấp cảm ơn trc ạ