Exercise: modal auxiliary, must 4.

Exercise on must to make assumptions (deductions) in past tense.

Read the sentences below. In brackets ( ) it says what you thought. Write your deduction in a past tense (perfect infinitive) using must.

Example:
You saw a girl yesterday. She was tall with green eyes, fair hair and a light skin. (You think: She was from Sweden.)

She must have been from Sweden.

1) Einstein developed the Theory of Relativity. (You think: He was very clever.)

He very clever.

2) She wasn't home when I called on Saturday. She usually goes shopping on Saturdays. (You think: She was shopping when I called.)

She when I called.

3) Everything is wet when you look out of the window one morning. (You think: It rained last night.)

It last night.

4) There were lights on in the house when I drove past last night. (The next day you think: John was at home last night.)

John at home last night.

5) You heard music and laughter next door last night. (The next day you think: The neighbours were having a party.)

The neighbours a party.

6) When Mary came in, you woke up in bed. (The next day you think: She got back very late.)

She back very late.

7) John told you the computer wasn't working yesterday. (You think: There was a problem with the software.)

There a problem with the software.

8) Nobody passed the English exam last week. (You think: It was very difficult.)

It very difficult.

9) You were watching a lion through binoculars. Then, you couldn't see it. (Later, you think: It was behind me!)

It behind me!

10) A bird was looking through the window. When you looked it flew off. (You think: It was watching me.)

It me.

*Incorrect answers are shown in red. You have TWO chances to find the correct answers.