You shouldn't ride your bike today.今天你不应该骑车。
You lost your helmet yesterday.昨天你丢了头盔。
You could hurt yourself in a fall,要是跌倒了你会受伤，
and then never ride at all.然后再也没法骑车了。
Meg shouldn't always stay up late.Meg 不应该每天都熬夜。
She knows her school bus comes at eight.她知道校车每天早上8点来。
She'll enjoy herself late tonight,她今晚熬夜会很开心，
but tomorrow she won't feel right.但明天白天就会觉得不舒服了。
They shouldn't stay in the sun all day.他们不应该整天呆在太阳下玩耍。
Sunglasses and hats make it safe to play.戴上太阳眼镜和遮阳帽会安全些。
If they burn themselves in the sun,如果他们把自己晒伤了，
later they won't have fun.他们就不会快乐了。
Al shouldn't run so fast, you know.Al 不应该跑这么快，你知道的。
The sidewalk's full of ice and snow.人行道结满了冰雪。
He could fall and slip and slide,他会跌倒、摔跤、滑倒，
and end up right on his backside !然后四脚朝天!
Ouch !痛!
