You must to respect the rules!
WRONG! You must respect the rules.
solving
RIGHT OR WRONG? You don't have to park here, there's a NO PARKING sign.
WRONG! You mustn't park here...
(Do)______ Pilates is good for your health.
doing
You mustn't leave your bag alone at the airport. The police will take it.
RIGHT!
I spent hours _______________________ with the playstation last night!
playing
You shouldn't spend so much time watching tv. It's better to do exercise.
RIGHT!
You can borrow the car if you remember ___ (get) some petrol.
to get
I enjoy to watch the sunset drinking a smoothie
WRONG! I enjoy watching the sunset drinking a smoothie.
You __________________ smoke here! There's a no smoking sign.
mustn't