The professor hoped to interest his students in English grammar.
His explanations were so interesting that all the students interested in.
Are the words which I have put in italics correctly used in these sentences?
closed as off-topic by starsplusplus, Chenmunka, Tyler James Young, Nigel Harper, nxx Apr 12 at 2:19
This question appears to be off-topic. The users who voted to close gave this specific reason:
As you seem to have figured out, interest can be used as a verb (to arouse the curiosity of) or as a noun (a feeling of wanting to know more about something).1
A professor can use either form to express his hope:
All of those are grammatical, but I'm not sure any of them represent how I'd express that sentiment. I think these two options sound more natural to my ear:
That said, the verb usage is acceptable, and the word does get used that way:
This sentence of yours does need some work, though:
Specifically, we need a verb before interested in, and an object after it. For example:
We could also change the preposition:
1Definitions 1 & 10 at Collins are paraphrased in parentheses.
I assume your concern comes from the financial meaning of the word "interest".