This has nothing to do with singular/plural and everything to do with verb conjugation, mostly because like, as it's used here is a verb, not a noun.

• "He likes to watch movies"
• Third person present tense
• You like
• Second person present tense
• "He doesn't like to watch movies"
• "He does like to watch movies"
• "Does he like to watch movies?"
• All three of the above are infinitive.

This has nothing to do with singular/plural and everything to do with verb conjugation, mostly because like, as it's used here is a verb, not a noun.

• "He likes to watch movies"
• Third person singular present tense.
• "They like to watch movies"
• Third person plural present tense.
• You like
• Second person present tense
• "He doesn't like to watch movies"
• "He does like to watch movies"
• "Does he like to watch movies?"
• All three of the above are infinitive.

This has nothing to do with singular/plural and everything to do with verb conjugation, mostly because like, as it's used here is a verb, not a noun.

This has nothing to do with singular/plural and everything to do with verb conjugation, mostly because like, as it's used here is a verb, not a noun.

• "He likes to watch movies"
• Third person present tense
• You like
• Second person present tense
• "He doesn't like to watch movies"
• "He does like to watch movies"
• "Does he like to watch movies?"
• All three of the above are infinitive.