supposed用法,supposed do还是doing

Supposed to do or supposed doing?

When we use the word "supposed", we usually mean "expected" or "believed". However, when it comes to grammar, there is a common question: should we use "supposed to do" or "supposed doing"? Let's take a closer look.

Supposed to do

The phrase "supposed to do" is used to talk about something that is expected or required to happen. For example:

1. I am supposed to go to the dentist tomorrow.
2. She is supposed to finish her project by Friday.

Here, "supposed to" is followed by a verb in the base form (infinitive) and it means that the action is necessary or expected.

Supposed doing

The phrase "supposed doing" is used to talk about something that is believed or assumed to be happening. For example:

3. He is supposed to be studying for his exam right now.
4. They are supposed to be on vacation in Haw网友i.

Here, "supposed" is followed by a present participle (verb + -ing) and it means that the action is believed or assumed to be happening.

Examples and differences

Let's look at some examples to see the difference between "supposed to do" and "supposed doing".

5. I am supposed to be working on my presentation. (I should be working on it, but I might not be.)
6. I am supposed to finish my presentation by tomorrow. (It is required that I finish it.)
7. He is supposed to be studying for his exam. (He might not be studying, but that's what we believe.)
8. He is supposed to take his exam next week. (It is scheduled for him to take the exam.)

As you can see, "supposed to do" is used to talk about obligations or requirements, while "supposed doing" is used to talk about beliefs or assumptions.

Conclusion

Now that we know the difference between "supposed to do" and "supposed doing", we can use them correctly in our sentences. Remember that "supposed to do" is used for obligations, while "supposed doing" is used for beliefs.

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supposed to do, supposed doing, difference