2. If you don't send invitation, people won't remember when it is.
3. Victor won't come if he can't, bring his girlfriend.
4. Unless you invite the neighbours, they may complain about the noise.
5. My parents won't let me have anothor barbecue unless we clear up afetrwards.
6. I might not have ime to tidy up if people don't help me.
(unless= if... not: nếu ko)
