1 要= "request; ask sb. to do sth. "
2 要 + length of time or amount of money, can express "cost; take".
3 (快/就)+要= "be going to; shall; will"
4 (想)+要+Verb = “hope; want; wish"
5 要 as "ought to; might; must; should"
6 不+要="Don't"
7 Conjunction "要是" = "if"
