Just do it!

Sit: Your firend don't understand English assignment. Modal verb: must

Sit: Your friend sleeps in the class every period because he/she played ROV, read novel, or watching series overnight. Modal verb: mustn't

Sit: Your friend wants to improve their English skills. Modal verb: need to

Sit: Your friend wants to be a billionaire. Modal Verb: have to

Sit: Your sweetheart can't get enough sleep. Modal verb: shouldn't

Sit: Your friend wants to have someone for his/her heart since he/she has been single for a long time. Modal verb: should

Sit: Your sibling wants to get the highest score on the Math examination. Modal verb: have to

Sit: Your parents want to win the lottery. Modal verb: should

Sit: Your friend had a fight with his/her partner. Modal verb: don't have to