PHÂN BIỆT WHERE - WHEN - WHICH TRONG MỆNH ĐỀ QUAN HỆ

WHEN -> ADV THỜI GIAN = IN/ AT/ ON WHICH.
WHERE -> ADV NƠI CHỐN = IN/ AT/ ON WHICH.
WHICH -> ĐẠI TỪ QUAN HỆ (CHỦ TỪ- TÂN NGỮ CHO VẬT).

A. WHICH

1. We bought a house which is 100 years old.
2. The university which I like is very famous.

B. WHEN = IN/ AT/ ON WHICH.

1. Monday is the day when/ on which i begin working.
2. Midnight is the time when/ at which the date changes.
3. 2001 was the year when/ in which the new century began.

C.  WHERE = IN/ AT/ ON/ UNDER WHICH.

1. That is the building where/ at which i work
2. The lake where/ in which we swim every day is clean.
3. Ho Chi Minh is the city where/ in which I am living.
4. The tree where/ under which they have a picnic is very tall.

Exercise:
1.  Our company was selected to renovate The ABC library,..... is one of the biggest in this city.

a.  Which
b.  Where
c.  When

2.    The Luxury Hotel,..... we stayed during our vacation, will be closed for renovations.

a. Which
b. Where (at which)
c. When.

3.    A company picnic is planned for July, ..... all staff will be back, Although no date has yet been selected.

a. Which
b. Where
c. When.  (in which: July)

4.    Any concerns should be directed to ABC Company, .... you purchased this product.

a. Which
b. Where
c. When
     (from which = where : purchase sth from..)