`-` CĐK Loại `1` : Diễn tả hành động có thật ở Hiện tại

`+` If - clause : Thì HTĐ : S + Vs / es

`+` Main - clause : Thì TLĐ : S + will + V

`-` Unless `=` If not : Trừ phi

`1`.Unless you try your best , you can't run fast

`2`.Unless the student goes to school early , he will be punished

`3`.Unless you touch them , the dogs can't bite you

`4`.Unless the young girl stops smoking , she will be ill

`5`.Unless people learn to swim , they can't swim well

`6`.If this man isn't a driver , he can't help you move by car

`7`.If you aren't sick , you can't join the club

`8`.If she isn't free , Linda can't do her homework

`\text{# TF}`