Lets practice “supposed to” and “have to”.
Supposed to
According to the weather forecast, it is supposed to snow tomorrow. (天気予報によると明日雪がふるはずです。)
I am supposed to wake up early tomorrow. (明日の朝早く起きるはずです。)
I was supposed to turn in my homework today, but I forgot. (今日までに宿題をだすはずでしたが、忘れてしまった。)
Have to
I have to wake up early tomorrow. (明日早く起きなくちゃいけない。)
I have to turn in my homework today. (今日は宿題をださなければならない。)
I didn’t have to go to work today because it snowed. (今日雪が降ったから、仕事に行く必要はありませんでした。)