... Tony biết Istanbul rất rõ bởi vì anh ta đã đến đó nhiều lần.
Had John ever studied Japanese before he moved to Japan?
Có phải John đã từng học tiếng Nhật trước khi anh ta chuyển đến Nhật?
She ... cuốn sách đó bởi vì cô ta đã xem qua phim.
We couldn't get a table because we hadn't booked in advance.
We couldn't get a table because in advance.
Chúng tôi đã không có bàn bởi ... he moved to New York.
to speak English until he moved to New York.
Marco đã không bao giờ cần nói tiếng Anh cho đến khi anh ta chuyển đến New York.
...
... past perfect simple and continuous and click on the button to
check your answers.
(Before doing the exercises you may want to read the lesson on the past perfect simple and
continuous)
Write ... tense:
ã for something that started in the past and continued up to a given time in the past:
When George died he and Anne had been married for nearly fifty years.
She didn’t want to move. She ... the past continuous or the past perfect
continuous.
1 When I asked Carlos if he wanted to go out, he said he couldn't because he
3. We had been looking for her ring for two hours and then...
... SHE HADN'T PREPARED FOR THE EXAM BUT SHE STILL PASSED. = Cô ta đã
không có chuẩn bị cho kỳ thi nhưng cô ta vẫn đậu.
** Công thức thể nghi vấn:
HAD + Chủ ngữ + Dạng quákhứhoànthành của...
... to come back in two hours.
7. My client and I slowly (walk) ______ back to the car.
8. Then we (see) ______ a small grocery store.
9. We (stop) in the grocery store and (buy) ______ some sandwiches.
10. ... Yesterday, I (get) ______ up at 6 and (have) ______ breakfast at 6.30.
VI. Chuyển những câu sau sang câu phủ định và nghi vấn
1/Nam wrote an essay in Literature class this morning.
______________________________________________________________________________
______________________________________________________________________________
2/I ... / think) that he was right.
10. I _________________ (cook) steak last night.
11. _________________ (Lucy / read) ‘War and Peace’ at school?
12. She _________________ (not / write) to her grandmother.
13....
... cả.
Ann wasn’t at home when I phoned. She was in London.
Khi tôi gọi điện Ann không có nhà. Cô ấy đã ở Luân Đôn.
Nhưng
Ann had just got home when I phoned. She had been in London.
Ann đã ... trọng.
The man sitting next to me on the plane was very nervous. He
hadn’t flown before./ He had never flown before.
Người đàn ông ngồì cạnh tôi trên máy bay đã rất hồi hộp. Trước
đó anh ấy chưa ... không?” “Không, anh ấy đã
đi về nhà rồi.”
Nhưng
“Was Tom there when you arrived?” “Yes, but he went home soon
afterward.”
“Lúc bạn đến Tom còn ở đó không?” “Có, nhưng ngay sau đó anh
ấy đã đi...
... They had cleaned the house when the
parents went home
Hanoi University – English Grammar
Thì QuáKhứHoàn Thành
Teacher : Dang Viet Thao – HaNoi University
Teacher : Dang Viet Thao – HaNoi University
... had played for Manchester United
VD: We had bought a ne w house at a
be autiful area
Cách chia
2. ThìQuáKhứHoànThành còn diễn tả hành
động xảy ra trước một mốc thời gian trong
quá khứ
VD: ... visit he r last Monday
VD: After she had finishe d her homework, she
we nt to bed last night
VD: Jane moved to London after she had
graduated from University
...
... lượng hỗn hợp ban đầu là 100g => m Al
2
O
3
= 10,2g ;; => m CaCO
3
= 80g . PTHH :
CaCO
3
CaO + CO
2
Độ giảm khối lượng = 100 – 67 = 33g chính laø
mCO
2
=> nCO
2
= 33 : 44 ... 0,75 mol
Theo PT : n CaCO
3
phản ứng = nCO
2
= 0,75mol
⇒
m CaCO
3
pö = 75g ; m CaCO
3
dö = 5g =>Chất rắn
gồm : m Al
2
O
3
= 10,2g ; m Fe
2
O
3
= 9,8g ;
m CaCO
3
dö = 5g ; mCaO = ... dö = 5g ; mCaO = 0,75.56 = 42g
Bài t an khi giải qui về 100
Bài t an khi giải qui về 100
Bài tập 2 : Có một hỗn hợp gồm Al
2
O
3
,
Fe
2
O
3
và CaCO
3
trong đó Al
2
O
3
chiếm
10,2% ,...
... business trip to England.
4.That officer announced that the meeting was delayed until next week.
5.He discovered that this cotton was grown in Egypt.
6.They promise that the performance will start ... the committee).
13.The broken cup is hidden in the drawer (by him).
14.This room is kept tidy (by them) all the time.
15.The party was voted a great success(by them).
16.Ann was given some bananas ... director is going to take a business trip to England.
4.It was announced that the meeting was delayed until next week.
5.It was discovered that this cotton was grown in Egypt.
18.She bought some...
... điều kiện)
Bài 8. Giải phương trình
.
Bài 9. Giải phương trình
PT
Đặt và
. Xét bảng biến thi n ta có:
.
Bài 12. Giải phương trình: .
Phương trình đã cho tương đương với:
Bài 13. Giải...