The boy is so young that he can't look after himself =
The boy is too young to look after himself.
My parents don't allow me to get my ears pierced =
I am not allowed to get my ears pierced by my parents.
If you are lazy,you may not pass the exam.=
Unless you work hard,you can pass the exam.
My brother went to the cinema,so did I =
My brother and I went to the cinema.
His daughter has decided to buy a camera
His daughter has made a decision to buy a camera.