HAVE TO - DON'T HAVE TO - MUST -MUSTN'T - CAN'T - DON'T

We must throw plastic bags in the sea

• RIGHT

• WRONG

Don't leave rubbish in the classroom

• RIGHT

• WRONG

You have to throw rubbish into the river

• RIGHT

• WRONG

You can't use biodegradable things. They will never dissappear

• RIGHT

• WRONG

We must protect natural habitats.

• RIGHT

• WRONG

We_______ protect the dolphins

• MUSTN'T

• MUST

• CAN'T

We _____ throw bottles into the sea.

• MUST

• DON'T

• CAN'T

We ____ respect and protect nature

• CAN'T

• MUST

• DON'T

I _____ help with the housework.

• HAVE TO

• CAN'T

• DON'T

We ____ leave rubbish in the classroom

• MUST

• MUSTN'T

• HAVE TO