1. If I were you, I wouldn't make the decision.
If I were you, I would.....: dùng để đưa ra lời khuyên
2. He ordered me to go out and close the door immediately.
order sb to do sth: yêu cầu ai làm gì
3. To take part in the training course next summer is very important.
4. People say that they are going to build a new railway next month.
It is said/ believed/ rumoured/ thought + that + clause= People+ say/ believe/ rumour/ think + that + clause.