writing 3 sentences each; need to/dont need to/must/had better Hello I learned some expressions and I made 3 sentences each. Could you correct them if there are unnatural sentences? I always appreciate you :) 1. need to - You need to fill in this document. - She needs to submit the final report. - You need to learn Vietnamese. 2. don't need to - You don't need to submit the additional documents. - You don't need to tell me details. - I think she doesn't need to go to see a doctor. 3. must - You must get in the line. - She must take his class in this semester to graduate. - You must take off your shoes. 4. had better - You'd better not cry or he won't come. - You'd better not listen to the news. - She had better wear a muffler.