Intermediate Grammar Project: UCI
This is my work on Intermediate Grammar Project from University of California.
Índice
- 1 Present Perfect
- 2 Past Participle
- 3 Adverbs
- 4 Stative Verbs
- 5 Present Perfect Progressive
- 6 Past Perfect
- 7 Modals
- 8 Adjectives
- 9 Comparatives and Superlatives
- 10 Appositives
- 11 Count and Non-Count nouns
- 12 Definite and Indefinite Articles
- 13 Quantifiers
- 14 Gerunds and Infinitives
- 15 Requests and Permissions
- 16 Pronouns
- 17 Adjectives and Adverbs
- 18 Nouns and Verbs
- 19 Prepositions
- 20 Phrasal Verbs
- 21 Collocations
Present Perfect
The present perfect is used to indicate a link between the present and the past. The time of the action is before now but not specified, and we are often more interested in the result than in the action itself.[1]
- ACTIONS STARTED IN THE PAST AND CONTINUING IN THE PRESENT
They haven't lived here for years. She has worked in the bank for five years. We have had the same car for ten years. Have you played the piano since you were a child?
- WHEN THE TIME PERIOD REFERRED TO HAS NOT FINISHED
I have worked hard this week. It has rained a lot this year. We haven't seen her today.
- ACTIONS REPEATED IN AN UNSPECIFIED PERIOD BETWEEN THE PAST AND NOW.
They have seen that film six times It has happened several times already. She has visited them frequently. We have eaten at that restaurant many times.
- ACTIONS COMPLETED IN THE VERY RECENT PAST (+JUST)
Have you just finished work? I have just eaten. We have just seen her. Has he just left?
- WHEN THE PRECISE TIME OF THE ACTION IS NOT IMPORTANT OR NOT KNOWN
Someone has eaten my soup! Have you seen 'Gone with the Wind'? She's studied Japanese, Russian, and English.
