Modal verbs/If firstcondition

You ………follow the rules

• Mustn’t

• Should

• Must

• Need

You ….to exercise regularly

• Must

• Need

• Should

• Shouldn’t

….. I go to the dentist?

• Must

• Should

• Can

• Need

You …go there,the place is wonderful

• Must

• Should

• Need

• Mustn’t

You……to study hard

• Must

• Mustn’t

• Need

• Should

Unless you study hard,

(a)  

If you drink enough water,

(a)