Present Perfect Tense with already/yet and for/since
Diposting oleh Helwinda Aprilia , Sabtu, 12 November 2011 01.04
The use of an adverb already, and yet in this tense in principle the same as the Present Perfect Tense.
a. Adverb already, and yet are used to reinforce the statement that something has or has not occurred at a non-specific (unspecified time) in the past. Already (has / have) used in positive sentences, while yet (yet) be used in negative sentences and interrogative sentence.
Already normally placed between the auxiliary (has / have) and verb3. In addition, already also can be placed at the end of the sentence without changing the meaning of the sentence.
Subject + (has/have) + already + been + (verb1+ing) + object + modifier
Atau
Subject + (has/have) + been + (verb1+ing) + object + modifier + already
example :
- I have already been living in this house for nine years.
- We have been studying English since a month ago already.
- He has already been marrying her for nineteen years.
- Mr. Johnson has been working in the same place since 1980 already.
b. Yet used in the negative adverb form (negative sentences) and interogative form (interrogative sentence), which is usually placed at the end of the sentence, as in the following formula :
Subject + (has/have) + not + been + (verb1+ing) + object + modifier + yet
example :
- I have not been living in this house for nine years yet.
- We have not been studying English for a month yet.
- He has not been marrying her for nineteen years yet.
- Mr. Johnson has not been working in the same place for twenty-nine years yet.
- She has not been waiting for her boyfriend for an hour yet.
Present Perfect Tense with for / since
usefulness of for and since the present perfect is
- To show when an activity started.
- To show how long an activity has been going on
example :
- They have played football since 7 o'clock.
- She has lived in this city for thirty years.
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