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 (Diemchuantuyensinh.comGRAMMAR: Tenses, transformation of tenses, subject and verb agreement, inversion, tag question - Transformation of tenses:

Transformation of tenses:

Notes:   a. It  + be + time + since + simple past

 b. It is the first/ second/ third …… time + present perfect
 c. The last time + simple past
 d. Present perfect + since + simple past


    Exercise: Rewrite these sentences:

1. The last time she had a swim was ten years ago.  She hasnt …………………………………………
2. I have never met such a famous person before.  It is …………………………………………………
3. I last saw him when I was a student.  I havent …………………………………………………………...
4. I havent come there for two years.  I last …………………………………………………………...
5. I have studied English for seven years.  I started …………………………………………………………...
   Exercise: Choose the best answer:
1. I have never seen such beautiful pictures before.
A. These pictures are the most beautiful I have never seen.
B. These pictures are the most beautiful I have ever seen.
C. This is the first time I see beautiful pictures.
D. This is the first time I have seen beautiful pictures.
2. Jack has stopped writing letters to Jill.
A. Jack has no longer stopped writing letters to Jill.   
B. Jack used to write letters to Jill.
C. Jack has never written letters to Jill.                     
D. Jack stopped writing letters to Jill when Jill come.
3. Mary has been working in this company for five years.
A. Mary began to work in this company for five years.
B. Mary began working in this company for five years ago.
C. Mary began to work in this company five years ago.
D. Mary has begun to work in this company five years ago.
4. I have never eaten this kind of food before.
A. I used to eat this kind of food before. 
B. Before I came here I had ever eaten this kind of food.
C. This is the first time I have ever eaten this kind of food.
D. This is the most delicious food I have ever eaten.
5. She last saw him years ago.
A. She hasnt seen him years ago
B. She hasnt seen him for years ago.
C. She didnt see him for years .
D. Its years since she last saw him.






6. Its ages since I last saw a Hollywood film.
A.  Its ages because I last saw a Hollywood film.
B. I havent seen any Hollywood film before.
C. I saw a last Hollywood film since ages ago.     
D. I havent seen a Hollywood film for a long time.
7. He hasnt smoked a cigarette for a week.
A. It is for a week that he hasnt smoked a cigarette. 
B. It is a week since he last smoked a cigarette.
C. It is a cigarette that he smoked a week ago.     
D. It is a week ago that he smoked a cigarette.
8. It started to rain at 2 oclock and it is still raining.
A. It has been raining at 2 oclock.
B. It has been raining since 2 oclock.
C. It has been raining for 2 oclock.
D. It has been raining in 2 oclock.
9. They had finished their tea and then they left.
A. They finished their tea after they had left.   
 B. After they had left, they finished their tea.
C. They had left before they finished their tea. 
D. After they had finished their tea, they left.
10. John began playing the piano 10 years ago.
A. John played the piano 10 years ago.
B. John has played the piano for 10 years.
C. John used to play the piano 10 years ago.
D. John doesnt play the piano anymore.

B. Subject and verb agreement:
1.  Singular SUBJECT + singular VERB
  Plural SUBJECT + plural VERB
 Notes:  a. Singular noun:Là danh từ không đếm được: butter, water, happiness, work, information..
                       Là danh từ đếm được số ít: book, student, chair, dog, cat…
                  b. Plural noun:  Là danh từ đếm dược số nhiều: books, students, chairs, dogs, cats …
 Cách thành lập danh từ số nhiều:
+ Thêm s: boys, houses, mothers, pens…
+ Thêm es: dishes, churches, boxes, buses…
+ Đổi y thành i, thêm es: baby _ babies , party _  parties, fly _ flies…
+ Đổi f, fe thành ves: knife_ knives, wife _ wives, life _ lives…
+ Luôn ở số nhiều: trousers, jeans, scissors, glasses…
+ Đặc biệt: man/ men, woman/ women, foot/ feet, child/ children, sheep/ sheep… 

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