English Verb Tenses: Conjugation and Time Markers
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English Verb Tenses: Structure and Usage
Present Tenses Comparison
This section details the structure (Affirmative, Negative, Interrogative) and common time expressions for the main present tenses.
Present Simple
- Affirmative (A): Base form (e.g., play).
- Negative (N): don't play / doesn't play.
- Interrogative (I): Does he + Base Verb Form?
- Keywords: every day, on Sundays, always, often, never.
Present Continuous
- Affirmative (A): to be (am/is/are) + V-ing (e.g., are listening).
- Negative (N): aren't / isn't + V-ing.
- Interrogative (I): Are they + V-ing?
- Keywords: now, right now, at the moment.
Present Perfect Simple
- Structure: Use have or has + Past Participle (V3).
- Negative (N): haven't / hasn't + V3.
- Verb Forms:
- If the verb is regular, use the -ed form.
- If the