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She find a teacher who can teach English grammar.

She find a teacher to be able to teach English grammar.

She find a teacher being able to teach English grammar.



He knows some guy who has a good command of English.

He knows some guy to have a good command of English.

He knows some guy having a good command of English.

You love the guy who sings well.

You love the guy to sing well.

You love the guy singing well.

Please tell me which one is wrong or unnatural.

Thanks.
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Lucas:

Please make a first guess on your own. Then we can discuss your answers.
Comments  
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Sorry, I should have made it much more clear that I would like to know.

The first sentence of each set is what I want to express. So, the second and third one should be equal with the first one. I would like to confirm whether I can change the relative clause to to-Infinitive or a present participle like what I did.

Thanks.

She find a teacher who can teach English grammar.

She find a teacher to be able to teach English grammar.

She find a teacher being able to teach English grammar.



He knows some guy who has a good command of English.

He knows some guy to have a good command of English.

He knows some guy having a good command of English.

You love the guy who sings well.

You love the guy to sing well.

You love the guy singing well.
Hi.
lucas21cSorry, I should have made it much more clear that I would like to know.

The first sentence of each set is what I want to express. So, the second and third one should be equal to the first one. I would like to confirm whether I can change the relative clause to to-Infinitive or a present participle like what I did.

Thanks.

She find has found/found a teacher who can teach English grammar.

She has found/found/is looking for a teacher to be able to/ a teacher who is be able to teach English grammar.

She has found/found a teacher having an ability/being able to teach English grammar.



He knows some guy who has a good command of English(teachers).(What kind of command is that? It doesn't make sense).

He knows some guy who has a good command of English teachers.

He knows some guy having a good command of English.


You love the guy who sings well.

You love the guy to sing well.

You love the guy singing well.

I guess there is no universal rule to do what you intended to. In your examples it doesn't sound better than relative clause you made up.
With the first one, do you mean that the teacher was found in the past, or in the present?

If it's the past, it would be:

"She found a teacher who can teach English grammar"

If it's present, it would either be:

"She is finding a teacher who can teach English grammar" or

"She finds a teacher who can teach English grammar"

I can't imagine where you would use the second one, even though to my knowledge it is correct English.

Your second one, the best one is:

"He knows a guy who has a good command of English"

To say "some guy" is an Americanism that may be used colloquially in the USA, but you wouldn't hear the same thing in England and it is not correct English.

For you third example, none are incorrect, it's just a matter of what you want to say.
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