Напишите 15 предложений с for, since

I've known my friend since my childhood
they have been working in the garden for four hours
I've been studying there since 2016
my parents have been married for 25 years
I've been already doing my homework for two hours

I have been studying English for five years
she has known me for two years
they have been digging potatoes since morning
I've not seen Tom for ages
we have been writing an essay for an hour

they haven't had lunch for an hour
I've lived here since my childhood
my sister has been waiting for me for two hours
I haven't seen Jane since morning
they haven't had a holiday for 5 years

1. I haven`t been in Kiev since December.
2. I was in Moscow for two weeks.
3. She hasn`t talked to her mother since their last quarrel.
4. They visited Japan for a month.
5. They prefer fish to meat since they suffered from infection.
6. They have been watching TV for 2 hours.
7. My mom doesn`t trust anyone since she was robbed.
8.  By the end of the day they will have been building a plane model for 2 hours.
9. He looks fatter since I saw him last time.
10. For how long will Mary have been staying with us by tomorrow?
11. He has since become rich.
12. I've got a present for you.
13. Let's go for a walk.
14. She has held two jobs since she graduated.
15.