Write questions using the following prompts. Be careful to use the correct gerund or infinitive after the verb
1. Do (Past Simple) he/offer/pay fo you?
2. Have (Present Perfect) you/decide (not)/go out later on?
3. You/want/go to the park?
4. Can you/avoid/go on roads on your bike?
5. What you/hope/do after college?
6. Do (Past Simple) you/promise (not)/tell anyone?
7. Are you/consider/buy this car?
8. Can you afford/rent/this house?

Should в условных 2 и 3 типа после местоимений 1-го лица сейчас не используется, это правило встречалось в англ. учебниках первой половины ХХ века))  Короче, такое употребление считается old-fashioned.

так что вот ответ:

1 If no one came to help, we would be obliged to do the work ourselves.

2 If you put on your glasses, you would see better.

3 What would we do if they were late?

4 Would you be angry if we didn't come?

5 Would he be displeased if I didn't ring him up?

6 They would be surprised if I made such a mistake.

7 If he didn't come in time, would we have to wait for him?

1. should discuss

2. should have bought

3. should try on

4. should have called

5. should have introduced

6. should reserve

7. should have taken part

8. should drive

9. should make/ should have made

Объяснение:

Везде где используется время или есть намек на предпочтительное совершение чего-то в то should have + verb, а везде где настоящее или будущее то should + verb.

В 6 тоже можно использовать оба варианта. Всё зависит от контекста опять таки, я бы использовал should reserve.

В 9 скорее всего should make an appointment, так как иначе было бы He was a very busy man, поэтому я бы выбрал should make.