This document discusses the present perfect tense in English. It outlines the structure, auxiliary verbs, and uses of the present perfect tense. Specifically, it notes that the present perfect tense is used for actions that occurred in a specific time period not defined as completed and can express whether the subject has or has not experienced an event or action before now. Examples are provided to illustrate the affirmative, negative, and interrogative forms of the present perfect tense using the verbs "to go" and "to be".
2. I, you, we, they
Auxiliary
Have
She, he, it Has
+ -
Haven’t
Hasn’t
3. Estructure
Afirmative:
Subjet+ auxiliary verb (has or have) + past participle
Negative:
Subjet+ auxiliary verb (hasn’t or haven’t) + past participle
Interrogative:
Auxiliary verb (has or have) + subjet+ past participle +
4. Uses:
the perfect present for actions that occurred in a specific
time not used before now
Examples:
• +She has gone to work
-She hasn’t gone to work
?Has she gone to
• +We have been to London.
-We haven’t been to London
?Have we been to London
