+ (positive) S + Ved, 2 ---> I played / I went (go) - (negative) S + didn't + V ---> I didn't play / I didn't go

? (question) Did + S + V? > Did you play? / Did you go?

She is ill, so she MUST see the doctor.
It’s raining heavily. You MUST take your umbrella.
We MUSTN’T pick the flowers in the park.
Mike is nine months old. He MUSTN’T eat nuts.
I am very tall. So I CAN play basketball.
I’m sorry but we CAN’T come to your party tomorrow.
You are speaking very quietly. I CAN’T understand you.
CAN I use your phone?
We CAN’T go to the bank today. We haven’t got any money.
My hands are dirty. I MUST wash them.
It’s late. I MUST go now.
You MUST stop at a red traffic light.
You MUSTN’T speed in the city.
Tourists MUST take their passports when they go abroad.
Footballers MUSTN’T touch the ball with their hands.
CAN you play the guitar?
I CAN’T come with you now. Because I’m studying my lessons.

George has traveled a lot. He can speak four languages.
I can’t sing now but I could sing very well when I was a child.
She will stay in bed till 10 o’clock this morning. Because she doesn't have to go to work.
Many students in Turkey must wear uniform when they go to school.
I’m sorry I couldn’t come yesterday. I had to work late.
You’ve been coughing a lot recently. You mustn't smoke so much.
You have a bad headache. So you must go to bed early.
I can’t swim very far these days but ten years ago I could swim from one side of the lake to the other.
You can see the sea from our bedroom window.
It isn’t permitted to speak Turkish during the lessons. So you mustn't speak Turkish.