You are supposed to do sth.你应该……/你被要求或期望做…… You should do sth.同上…… You had better (not) dos sth.你最好（别）…… You must do sth.你必须…… You may do sth.你可以…… You can/could do sth.同上…… It's best /ncessary /important for you to do sth.对你来说做某事很有必要的、是必需的.
You are supposed to do sth.你应该……/你被要求或期望做……You should do sth.同上……You had better (not) dos sth.你最好（别）……You must do sth.你必须……You may do sth.你可以……You can/could do sth.同上……It's best /ncessary /important for you to do sth.对你来说做某事很有必要的、是必需的。 纯手工的，望采纳~
