I can speak English but I can't speak German.
When I'm at school I have to wear my school uniform.
When I'm at home I don't have to wear sunglasses (хотя сейчас актуальнее написать to wear a mask).
My mum always says that I mustn't interrupt (перебивать) her.
Before I'm 18, I can't drive.
When I was five I couldn't write.
My parents had to buy a new washing-machine when the old one broke down.
My classmates might take part in our school tennis competition.