Infinitives in Sentence Structure

The video tutorial covers the use of infinitives as subjects in sentences, explaining how they can be structured with 'it' at the beginning and the infinitive phrase at the end. It discusses using 'for' to specify subjects, and how infinitives are used with cost and time expressions. The tutorial also touches on formal sentence structures with infinitives, and includes exercises for practice, focusing on creating sentences with infinitives and using adjectives with infinitives.

What is the role of an infinitive in a sentence as discussed in the introduction?

• It acts as a verb.

• It serves as the subject.

• It is used as an adjective.

• It modifies the noun.

How is the sentence 'It's good to help other people' structured?

• Subject in the middle, infinitive at the beginning.

• Infinitive in the middle, subject at the end.

• Subject at the beginning, infinitive at the end.

• Infinitive at the beginning, subject at the end.

What does adding 'for' plus an object do in a sentence with an infinitive?

• It adds an adjective.

• It makes the sentence passive.

• It specifies the subject.

• It changes the tense of the sentence.

Which of the following is an example of using an infinitive after 'cost'?

• It costs a lot of money for building a library.

• It costs a lot of money by building a library.

• It costs a lot of money building a library.

• It costs a lot of money to build a library.

How can infinitives be used with indirect objects?

• By placing the indirect object before the infinitive.

• By placing the indirect object after the infinitive.

• By using 'to' before the indirect object.

• By using 'for' before the indirect object.

Which sentence is an example of a formal structure using an infinitive?

• Carnegie's dream was to build libraries.

• Building libraries was Carnegie's dream.

• To build libraries was Carnegie's dream.

• Carnegie dreamed of building libraries.

What is the focus of Exercise 17?

• Creating sentences with adjectives.

• Creating sentences with infinitives.

• Creating sentences with verbs.

• Creating sentences with nouns.

Which of the following is a correct sentence from Exercise 17?

• It's dangerous by driving without your seat belt.

• It's dangerous for driving without your seat belt.

• It's dangerous driving without your seat belt.

• It's dangerous to drive without your seat belt.

What is the main activity in Exercise 18?

• Practicing sentence construction with three words.

• Practicing sentence construction with four words.

• Practicing sentence construction with one word.

• Practicing sentence construction with two words.

Which sentence is an example from Exercise 18?

• It's fun for children to play in the water.

• It's fun for children to playing in the water.

• It's fun for children by playing in the water.

• It's fun for children playing in the water.