Infinitive Structures and Uses

In this advanced grammar lesson, Alex explains the use of active and passive infinitives. The lesson covers active simple infinitives, where the subject performs an action, and active past infinitives, which involve actions completed in the past. It also discusses passive simple infinitives, where the subject receives an action, and passive past infinitives, which are less commonly used. The video provides examples and suggests reviewing previous lessons for a better understanding of infinitives. Viewers are encouraged to take a quiz and suggest future topics.

What is the main focus of this lesson?

• Past perfect tense

• Active and passive infinitives

• Common verbs

• Adjective clauses

What is the recommended action before starting this lesson?

• Review previous lessons on infinitives

• Skip to the quiz

• Practice speaking

• Read a grammar book

Which of the following is an example of an active infinitive?

• To be given

• To invite

• To have been chosen

• To be invited

Which verb is always followed by an infinitive?

• Enjoy

• Avoid

• Seem

• Consider

Which of the following is an example of a verb followed by an infinitive?

• Enjoy

• Plan

• Consider

• Avoid

What is the base form of an infinitive?

• To plus past participle

• To plus base verb

• To plus adjective

• To plus gerund

What is the structure used for active past infinitives?

• To do plus base verb

• To have been plus past participle

• To have plus past participle

• To be plus base verb

In the sentence 'I was happy to have finished everything early,' what does the infinitive phrase indicate?

• An ongoing action

• A past action completed before another past action

• A simultaneous action

• A future action

Which sentence uses an active past infinitive?

• I was happy to finish early.

• I was happy to have finished early.

• I am happy to be invited.

• I expect to be invited.

What is the structure for passive simple infinitives?

• To have plus base verb

• To be plus past participle

• To do plus base verb

• To have been plus past participle