Present Perfect Tense:
Present Perfect Tense can be used in the following situations:
I. To describe actions that happened in pastbut some of whose effects are still active at present.
Examples:
In the first sentence, the action of submitting the application happened in past and its effects are active at present. An effect could be that he is waiting for the result or he wants to know whether he will be selected or not.
In the second sentence, the action of going took place in past but its effects are still active at present. The chairman is not in officr these days as he is in Italy.
II. Another application for Present Perfect Tense could be to indicate an action that began at some time in the past and has continued up to the present moment. Usually since and for are used in this case.
Examples:
Convert it into Present Perfect Tense. The importance of genetic engineering __________ changes to the genes of a plant or an animal. | |||
Right Option : A | |||
View Explanation |
Change the given sentence into present perfect. They said ,"We've lived here for a long time." | |||
Right Option : C | |||
View Explanation |
Convert it into Present Perfect Tense. The researcher, Dr Smith ____________ the fact that the genetic modification of animal is not new. | |||
Right Option : D | |||
View Explanation |
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