1) She "met" him before he left London.
A) She "met" him before he left London.
B) She "had met" him before he left London.
Explanation:
Two past actions should be described using Simple Past and Past Perfect.
2) The train "left" before I arrived at the station.
A) The train "had left" before I arrived at the station.
B) The train "left" before I arrived at the station.
3) The boss asked me how long I "am working" in my previous job.
A) The boss asked me how long I "am working" in my previous job.
B) The boss asked me how long I "had worked" in my previous job.
Explanation:
"how long" expects Perfect or Perfect Continuous clause.
4) The teacher asked me how long I "am working" on the assignment.
A) The teacher asked me how long I "had worked" on the assignment.
B) The teacher asked me how long I "am working" on the assignment.
5) If it "rained" he would have cancelled the tickets.
A) If it "rained" he would have cancelled the tickets.
B) If it "had rained" he would have cancelled the tickets.
Explanation:
Use Simple Past or Past Perfect with Future Perfect clauses.
6) I would have passed if I "worked" hard.
A) I would have passed if I "had worked" hard.
B) I would have passed if I "worked" hard.
7) He would have been careful if I "warned" him.
A) He would have been careful if I "warned" him.
B) He would have been careful if I "had warned" him.
8) The book costed him five dollars.
A) The book costed him five dollars
B) The book cost him five dollars
Explanation:
Do not say "Costed".
9) The textbook "costed" her ten rupees.
A) The textbook "cost" her ten rupees.
B) The textbook "costed" her ten rupees.
10) The man was "hung" for murder.
A) The man was "hung" for murder.
B) The man was "hanged" for murder.
Explanation:
Use "hanged" for death and "hung" for hanging items in the house.
11) The calendar was "hanged" upside down.
A) The calendar was "hanged" upside down.
B) The calendar was "hung" upside down.
12) The criminal was "hung" three days ago.
A) The criminal was "hung" three days ago.
B) The criminal was "hanged" three days ago.
13) The calendar was "hanged" on the wall.
A) The calendar was "hung" on the wall.
B) The calendar was "hanged" on the wall.
14) His paintings are "hanged' in the room.
A) His paintings are "hanged' in the room.
B) His paintings are "hung' in the room.
15) The poster is "hanging" outside the building.
A) The poster is "hanging" outside the building.
B) The poster is "hung" outside the building.
16) If you come I "would" punish you.
A) If you come I "would" punish you.
B) If you come I "will" punish you.
Explanation:
Use Simple Future with Simple Present clauses.
17) If it rains they "would" cancel the match.
A) If it rains they "will" cancel the match.
B) If it rains they "would" cancel the match.
18) You "would" pass if you work hard.
A) You "will" pass if you work hard.
B) You "would" pass if you work hard.
19) She "will" bring you the book if you requested her.
A) She "will" bring you the book if you requested her.
B) She "would" bring you the book if you requested her.
Explanation:
Simple Future - Simple Past
20) If you were me, you "will" do it.
A) If you were me, you "would" do it.
B) If you were me, you "will" do it.
