This document discusses the present simple tense in English. It covers:
- Forming affirmative sentences with the present simple by using the base form of the verb for all subjects except the third person singular, which takes -s.
- Forming negative sentences by adding do/does not before the base form of the verb.
- Forming questions with do/does and short answers with yes/no followed by the subject and base/base+s form of the verb. Examples are provided to illustrate the rules.