Friday, 10 April 2015

present perfect continuous



                  Structure of sentence.
Positive Sentence.
• Subject + Auxiliary verb + main verb (Present participle) + Object + Time reference
• Subject + has been/have been + (1st form of verb or base verb + ing) + object +    time reference

If the subject is “He, She, It, singular or proper name” then auxiliary verb “has been” is used after subject in sentence.
If subject is “You, They or plural” then auxiliary verb “have been” is used after subject in sentence.

Examples
.
        He has been watering the plants for two hours.
        I have been studying since 3 O’clock

Negative Sentence.
• Subject +”Not” between the Auxiliary verb + main verb (present participle) +     Object + Time reference

• Subject + has not been/have not been + (1st form of verb or base verb + ing) +    object + time reference

To make negative sentence, the word “not” is written between the auxiliary verbs, so it becomes like “has not been or have not been”. The rule for using auxiliary verb “has been or have been” in negative sentences is as same as mentioned above.

Examples
.
        He has not been watering the plants for two hours.
        I have not been studying since 3 O’clock.

Interrogative Sentence.
• Auxiliary verb + Subject + Auxiliary verb + main verb (present participle) + object +    time reference

• Has/have + Subject + been + (1st form of verb or base verb+ing) + object + time    reference
Interrogative sentence starts with auxiliary verb. If the subject is “He, She, It, singular or proper name” then the sentence starts with auxiliary verb “has” and auxiliary verb “been” is used after subject
If subject is “You, They or plural” then the sentence starts with auxiliary verb “have” and “been” is used after subject

Examples
.
      Has he been watering the plants for two hours?
      Have I been studying since 3 O’clock?

More examples.
Positive sentences
           It has been raining for three days.
           I have been living in America since 2003.
           He has been playing cricket for two hours.
           They have been watching television since 6 O’clock.
           She has been working in this office since 2007.
Negative sentences
         It has not been raining for three days.
         I have not been living in America since 2003.
         He has not been playing cricket for two hours.
         They have not been watching television since 6 O’clock.
         She has not been working in this office since 2007.
Positive sentences
        Has it been raining for three days?
        Have I been living in America since 2003?
        Has he been playing cricket for two hours.
        Have they been watching television since 6 O’clock?
        Has she been working in this office since 2007?

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