Youtube Exercise

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1. How do we usually form the simple past for regular verbs?

2. Which auxiliary verb is used for negative sentences and questions in the simple past?

3. How do we form the present perfect tense?

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1. What is the main difference between the simple past and the present perfect for completed past actions?

Simple past: we know when it happened; present perfect: we don’t know when it happened
Simple past: we don’t know when it happened; present perfect: we know when it happened
They always mean exactly the same thing

2. Why are time markers important for distinguishing the two tenses in this lesson?

Time markers are necessary in a simple past sentence but not in a present perfect one
Time markers are not used with either tense
Time markers are necessary in present perfect sentences but not in simple past sentences

3. Which list contains optional time markers the speaker mentions for the present perfect?

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1. Why does the speaker choose the simple past in: “She watched a great show on TV last night”?

2. In the example “He has read this book,” why is the present perfect used?

3. In the practice sentence about traveling, why is “Did you travel to South America last year?” simple past?

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1. Which sentence is the best match for present perfect (unknown time)?

2. Which time marker most strongly suggests the simple past?

3. Which auxiliary verb is used in many present perfect questions?

Simple Past Vs. Present Perfect – Grammar & Verb Tenses