1. I wanted to finish my homework, so I stayed up late last night. ( as )
-> I stayed up late last night  as to finish my homework
2. The thick fog prevented me from driving to work. ( made )
-> The thick fog made it impossible for me to drive to work
3. Nick hasn't been to Viet Nam before. ( time )
-> This is the first time Nick has been to VN
4. Mr. Lam teaches Englishh. Mr. Hai teaches Math. (subject )
-> Mr. Lam doesn't teach the same subject as Mr Hai
5. I 'd rather not see him tomorrow. ( want )
-> I don't want to see him tomorrow.