Present Simple
1. I hang out with my friends every Saturday night.
2. The train leaves at 3 p.m.
3. Today is the perfect weather to go to the beach.
Present Continuous
1. I am talking to my friend right now.
2. While we were having dinner, she was reading an interesting book.
3.Look! Your cat is trying to steal a meatball from the table.
Present Perfect.
1. I have never been to Paris.
2. We have known each other for ages.
3. She hasn't done her homework yet.
Present Perfect Continuous
1. Where have you been? (present perfect) I have been wating for you for a whole hour! (present perfect continuous)
2. I have been working all day.
3. She has been reading a book for 20 minutes
1 If you send an e-mail, it is free.
2 It is dangerous if you don't wear a seatbelt.
3 If you have an injection, it doesn’t usually hurt.
4 If you don't water plants and flowers,they die.
5 If the sea isn’t calm, it isn't safe to swim.