选择题
Question 1: Choose the correct answer
1. He has ________ for three days.
a) been
b) being
c) be
Correct answer: a) been
Explanation: The correct form of the present perfect continuous tense is "has/have been + present participle (-ing)," so the correct answer is "been."
填空题
Question 2: Fill in the blanks
2. He has ________ working on the project ________ Monday.
Answer: been, since
Explanation: In the present perfect continuous tense, we use "been" followed by the present participle, and "since" is used to indicate the starting point of the action.
判断题
Question 3: True or False
3. The sentence "He has been working for three days" indicates a completed action.
Answer: False
Explanation: The present perfect continuous tense indicates an action that started in the past and is still continuing, so the statement is false.
论述题
Question 4: Discuss the usage of present perfect continuous tense
4. Explain the difference between the present perfect continuous and present perfect simple tenses, and provide examples of each.
Answer:
The present perfect continuous tense is used to indicate an action that started in the past and is still continuing or has just stopped. It focuses on the duration or continuous nature of the action. For example: "He has been studying for two hours."
On the other hand, the present perfect simple tense is used to indicate an action that happened at an unspecified time before now or that has an effect on the present. For example: "He has finished his work."
综合题
Question 5: Comprehensive Exercise
5. Rewrite the following sentences using the present perfect continuous tense.
a) She has been painting the house for a week.
b) They have been waiting for the bus since morning.
c) I have been reading this book for hours.
Answers:
a) The house has been painted by her for a week.
b) The bus has been waited for by them since morning.
c) This book has been read by me for hours.
Explanation: In these sentences, the active voice is transformed into the passive voice while maintaining the present perfect continuous tense.
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