Are these sentences natural? July 20

1. How many calories must there be in that icing?

2. I don’t know how she must be feeling about my using her hand sanitizer.

3. No wonder I see you working late, taking care of other people’s messes.

Thanks MM.

A follow up question, if you don't mind. Are these variations okay?

4. I wonder how many calories must be there in that icing.

5. How must she be feeling for me using her hand sanitizer?

#5 is no good. Re #4, what do you mean by 'there'? Is it existential or locational?

Mister Micawber#5 is no good. Re #4, what do you mean by 'there'? Is it existential or locational?

By 'there', I meant in the icing. Maybe this is better: 4b. I wonder how many calories must be in that icing.

Also, how would you correct #5?

4. I wonder how many calories must be there in that icing?

If there is existential: I wonder how many calories there must be in the icing?

If there is an adverb of location: I wonder how many calories must be there in the icing?

Your 4b is fine, too.

5. How must she be feeling about my using her hand sanitizer?

Thanks MM.

Mister Micawber4. I wonder how many calories must be there in that icing?
If there is existential: I wonder how many calories there must be in the icing?

If there is an adverb of location: I wonder how many calories must be there in the icing?

Not sure why you have used the question marks in these sentences. I thought they were

I always feel they are questions.