8.(10) To explain what they have seen , they build a theory about how things happen and the causes and effects.

S: Subject:(8)

Attribute(2)(3)

Object(1)(9)

Adverbial(4)(5)(6)(7)(10)

Step IV Practice

T: Now let’s do some exercises on P6, Ex2 and Ex3.Rewrite the sentences with “to be done” or “to have been done”.

He wanted the nurses to take care of the patient.

-He wanted the patient to be taken care of.

Because “the patient” is the logical object of “take care of”, the passive infinitive should be used in the second sentence.

The car was reported to have been stolen.

But when the action expressed by the Infinitive happens before the predicate, the perfect infinitive should be used.

Homework

Finish all the exx in Grammar. Preview the content in Integrating skills.

The Design of the Writing on the Bb

Unit 1 Making a difference

The Third Period

Phrase: use up

Grammar: the Infinitive

7.People who listen to Hawking’s lectures sometimes find it difficult (9) to understand him .

6.What does it mean (8) to be a scientist?

5.He traveled around the world (7) to give lectures .

4.Readers were pleased and surprised (6) to find that a scientist could write about his work in a way that ordinary people could understand .

3.(4) In order to get married ,I needed a job, and (5) in order to get a job , I needed a PhD.

2.The doctor told him that he may not have more than twelve months (3) to live .

1.Some things need (1) to be believed (2) to be seen .

5. Her wish is to become a pop singer .

T: Tell me the function of the underlined part in each sentence.

S: No.1 is used as the object.

S: No.2 is used as the subject. It is more usual to use formal subject “it” and the infinitive phrase is usually placed at the end of the sentence, that is “it is…to do sth.”.

S: No.3 is used as the attribute.

S: No.4 is used as the adverbial for purpose.

S: No.5 is used as the predicative.

T: Now let’s do an ex on the screen. Group the infinitives according to how they are used.

4. He went home to see his sick mother .