Do these sentences make any sense?

[ginawilson]

I am self-studying Chinese, and I am pretty sure I make grammar mistakes out the whazoo.

So, are these sentences even remotely correct?

我觉得体操运动员是最强壮。

我觉得足球运动员打得很好。

Is it okay to use 是 before saying something is 最 [adjective]?

Sorry for my n00b questions.

[tommy175]

Of course, Not....

To modify the sentence, you should put a "的" in the end of the sentence.

我觉得体操运动员是最强壮的

To remove the "是" is also OK, but not that natural

[Bird in a Forest]

是 can only be used to connect two nouns together. However, your sentences are ungrammatical because you are connecting an adjective to a noun, which is not possible. By adding 的 at the end you are turning the adjective into a noun.

E.g. 我觉得体操运动员是最强壮的。

I feel these gymnasts are the strongest ones (the strongest gymnasts). The "gymnasts" is implied by adding 的 to the adjective.

You could remove the 是, but it would sound strange.