1) Complete the sentence with must, mustn't, have to, or don't have to: I _______ clean the kitchen after cooking, because my mom says so.  a) must b) musn't c) have to d) don't have to 2) Is this sentence correct: My sister have to clean her room before going out. a) Correct b) Incorrect 3) What is the use of must? a) Express obligation, but based on a rule or law.  b) Expresses prohibition. c) Express obligation, but based on a personal opinion. d) Expresses that something is not necessary.. 4) Complete the sentence with must, mustn't, have to, or don't have to: You _______ mop the floor if it is already clean. a) must b) musn't c) have to d) don't have to 5) What is the use of musn't? a) Express obligation, but based on a rule or law. b) Expresses prohibition. c) Express obligation, but based on a personal opinion. d) Expresses that something is not necessary.. 6) Is this sentence correct: Yanet and Celene must arrives on time for the meeting. a) Correct b) Incorrect 7) Complete the sentence with must, mustn't, have to, or don't have to: I________ remember to lock the door when I leave the house. a) must b) musn't c) have to d) don't have to 8) What is the use of have to? a) Express obligation, but based on a rule or law. b) Expresses prohibition. c) Express obligation, but based on a personal opinion. d) Expresses that something is not necessary.. 9) Complete the sentence with must, mustn't, have to, or don't have to: You ________ leave the refrigerator door open, it would waste a lot of energy. a) must b) musn't c) have to d) don't have to 10) What is the use of don't have to? a) Express obligation, but based on a rule or law. b) Expresses prohibition. c) Express obligation, but based on a personal opinion. d) Expresses that something is not necessary..

MUST VS. HAVE TO

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