Be supposed to do 和 suppose to do 有什么区别

be supposed to + infinitive = should
我应该叫你吃饭,这里的不定式进行时是由于suppose这个非谓语动词引起的,表示将来.
supposed to be = generally believed to be
This stuff’s supposed to be good for stomach cramps. Why don’t you try it?
I suppose to call you for dinner. 这句话应该是错误的.应该是口语中的省略现象造成的.
When you are practising these examples in speech, note that the final d in supposed to is not pronounced. It is pronounced as 'suppose to', but should always be written in its correct form grammatically as supposed to.
如果一定要翻译可以理解为我想请你吃饭
suppose = think/believe/imagine/expect
I suppose it’s too late to see the doctor now, isn’t it?
不定式的进行式所表示的动作与谓语动词动作同时发生,也可以表示将来.