Yes, this is wrong. When asking a question, we generally add in helping verbs, usually from "to be" or "to do." These helping verbs are not always necessary to have in the statement (unless it is a statement about existence/to be), but are quite helpful in the questioning sentence because they help the action verb.
Example: Question: Do I like cats? Statement: I like cats.
Example: Question: Do I feel afraid? Statement: I feel afraid.
So you see how we tag on that helping verb at the beginning of the sentence. The action verbs are "like" and "feel" - these are the actions, the things we do. The helping verbs just help make these sentences into questions.
In questions about existence/being, we move the verb to the beginning.
- Example: Question: Am I here? Statement: I am here.
When questions involve the third person singular (he/she/it/Anna/mama/Billy), we take an extra step with the action verb and take away the s at the end.
Example: Question: What does he like_ to drink? Statement: He likes to drink water.
Example: Question: Does she like_ cats? Statement: She likes cats.
Example: Question: Does Mama feel_ afraid? Statement: Mama feels afraid.
In the sentences above, I put the _ at the end to emphasize there is a lack of the s. In normal writing, of course, don't input the _. :)
Now in the below, which is a question and then statement of existence, there is no s to take away, because there is no action verb. We just move the verb about existence to the beginning:
- Example: Question: Is Billy here? Statement: Billy is here.
Hope this helps. So long story short - you need a helping verb and need to take away an s to make it, "What does he like to drink?"
(Note - you can follow this same general pattern in the past tense, too, with regular verbs. Did he like_ it? He liked it. Was he there? He was there. There will be exceptions, of course, since not all verb conjugations and tenses are easily formed by just adding or removing an s or d at the end - Did he stand there? He stood there. etc. But this will get you on your way.)