1. third person singular present tense of ‘do’
Usage: used with he, she, it, or singular nouns
2. used to form questions in the present tense
Usage: auxiliary verb
3. used to form negative statements with ‘not’
Usage: auxiliary verb; contracts to ‘doesn’t’

Examples

• She does her homework every night.
• Does he live in this neighborhood?
• The machine does not work properly.
• He does seem tired today.
• Does this make sense to you?
• She does enjoy reading mystery novels.
• The cat does whatever it wants.