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1 is covered
2 was invited
3 were caused
4 is being built
5 wasn't stolen
6 would be stacked
7 was invented
8 were translated
9 will be canceled
10 has not been used
11 being caught
12 was invented
13 is believed
14 has been celebrated
15 painted
16 are being planted
17 was taken
18 to be recognized
B1
1. is
2. is
3. are
4. is
5. is/ am
6. aren't
7. are
8. Is she
9. is
10. are
B2
5. doesn't
7. don't
8. doesn't
9. don't
10. don't
B3
1. starts
2. likes
3. bake
4. writes
5. doesn't know
6. has
7. swim
8. helps
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CT thì hiện tại đơn:
(+) S + V(s/es) + O
(-) S + don't/ doesn't + V + O
(?) Do/Does + S + V + O?
Tobe: am/is/are
- Nếu chủ ngữ là số ít, he, she, it thì tobe là is và V phải thêm s/es.
- Nếu chủ ngữ là số nhiều, you, we, they thì to be là are và V giữ nguyên.
- Nếu chủ ngữ là I thì tobe là am và V cũng giữ nguyên.
1. Did you watch
2. have watched
3. read
4. Have you read
5. am reading
6. have finished
76 Young people of different nationalities
77 There are ten expeditions every year
78 Each expedition lasts for ten weeks and takes 150 volunteers
79 Help scientists to do environmental research
80 It is English
76. Young people goes on expeditions.
77. There are ten expeditions every year.
78. Each expedition last for ten week.
79. Volunteer help scientists to do environmental research.
80. We must know speak English to become a volunteer.