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USE 4 Duration from the past until now (Non-Continuous Verbs)
USE 3 Multiple actions at different times USE 2. Personal experience, achievements, changes over time, BUT details about definite time will be in the Past Simple · He resigned because she lost a vote of no confidence. She has a baby boy this morning. You can use the Present Perfect to describe your experience. It is like saying, "I have the experience of..." You can also use this tense to say that you have never had a certain experience. The Present Perfect is NOT used to describe a specific event. Examples:
We often use the Present Perfect to list the accomplishments of individuals and humanity. You cannot mention a specific time. Examples:
We also use the Present Perfect to talk about change that has happened over a period of time. Examples:
We use the Present Perfect after the constructions It’s the first/second/third, etc time I/he/she ….
We use the Present Perfect after the constructions in the superlative degree:
We also use the Present Perfect to talk about several different actions which have occurred in the past at different times. Present Perfect suggests the process is not complete and more actions are possible. Examples:
With Statal uses of Mixed Verbs, we use the Present Perfect to show that something started in the past and has continued up until now. " For five minutes," "for two weeks," and "since Tuesday" are all durations which can be used with the Present Perfect. Examples:
Although the above use of Present Perfect is normally limited to Non-Continuous Verbs and non-continuous uses of Mixed Verbs, the words "live," "work," "teach," and "study" are sometimes used in this way even though they are NOT Non-Continuous Verbs.
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