Mastering English Grammar: Perfect Tenses, Gerunds, Infinitives, and Modals
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Present Perfect Continuous
AFF (Affirmative): Subject + have/has been + V.-ing
NEG (Negative): Subject + have/has not + been + V.-ing
INT (Interrogative): Have/Has + Subject + been + V.-ing
Uses:
- Actions that started in the past and are still continuing.
- Actions that have finished recently.
Expressions: for a year, since 2002, how long...?, all night...
Past Perfect Continuous
AFF (Affirmative): Subject + had been + V.-ing
NEG (Negative): Subject + had not been + V.-ing
INT (Interrogative): Had + Subject + been + V.-ing
Uses:
- To talk about a prolonged action that occurred in the past before another brief action.
Expressions: for hours, since last year, all morning, when, until, before...
Gerunds
A verbal form ending in -ing that functions as a noun in the... Continuar leyendo "Mastering English Grammar: Perfect Tenses, Gerunds, Infinitives, and Modals" »
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