4. You are not supposed to... 你不能……
◆ 疯狂讲解
“be supposed to” 表示“应该做…..”

◆ 疯狂操练
You are not supposed to swim too soon after eating.
（吃完饭后，不能马上去游泳。）

◆ 疯狂实战
A: You’re not supposed to park your car here. It’s private parking only.
B: But I’m only going to be five minutes. Give me a break, please.
A: 你不能将车停在这里。这是私人停车场。
B: 但我只要停五分钟。行个方便吧，拜托！