[Grammar] kinds of OR kind of

[Yovo]

Which of the two is correct:

certain kind of expressions
or
certain kinds of expression?

or maybe bot plural as

certain kinds of texts ?

thank you

 

[emsr2d2]

It is impossible to answer your question without a full sentence to consider. Please write some example sentences for us.

 

[Yovo]

This is the sentence.

I think that they are not useful for every kind of text.
They are useful only for certain kinds of texts or expressions.

 

[GoesStation]

[STRIKE]This is[/STRIKE] These are the sentences.

I think that they are not useful for every kind of text.
They are useful only for certain kinds of texts or expressions.

Both sentences are correct. Every is followed by a singular noun.