【明報專訊】Pat has had a "bill shock", which refers to a shock one may have upon receiving an unexpectedly hefty bill. What has happened?

■English highway: -sentences

Third conditional sentences

Third conditional sentences refer to situations in the past that are hypothetical or counterfactual.

The structure is:

"if + past perfect" and "would + perfect infinitive"

e.g. If you had told me that, I would have made better preparations.

We wouldn't have been late if we had caught the train.

■Quiz

Underline the correct answers.

(answers on last text)

1. If I (knew / had known) you were coming, I would (bought / have bought) some snacks.

2. She (would not have passed / would have passed) the test if she (didn't study hard / hadn't studied hard).

3. He (will not get lost / would not have got lost) if you (have given / had given) him the map.

4. If I (had have / had had) your address, I (have sent / would have sent) you a postcard.

■Glossary

unexpectedly (adv) 意料之外地

hefty (adj) 巨額的

roaming (n) 國際漫遊

from time to time (prep phr) 不時