Problem 9      Logical Conclusions Events that repeat

 

Example

 

S                must       verb word         repeated time    

 

My friend         must              call                     often.

 

 

Exercises

 

Incorrect:  The light is always out in her room at ten o’clock; she must have go to bed early every

night.

Correct  :  The light is always out in her room at ten o’clock; she must go to bed early every night.

 

Incorrect:  Our neighbors must having a lot of money because they are always taking expensive

trips.

Correct  :  Our neighbors must have a lot of money because they are always taking expensive trips.

 

Incorrect:  He can like his job because he seems very happy.

Correct  :  He must like his job because he seems very happy.

 

Incorrect:  Her English is very good; she must spoken it often.

Correct  :  Her English is very good; she must speak it often.

 

Incorrect:  Carol always gets good grades; she should study a lot.

Correct  :  Carol always gets good grades; she must study a lot.

 

 

 

 

 

Problem 10    Knowledge and Ability Know and Know How

 

Examples

 

S            KNOW               noun 

   

I             know            the answer.

 

 

S            KNOW            how               infinitive

 

I             know              how                           to answer             the question.

 

 

Exercises

 

Incorrect:  If she knew to drive, he would lend her his car.

Correct  :  If she know to drive , he would lend her his car.

Incorrect:  I don’t know to use the card catalog in the library.

Correct  :  I don’t know how to usethe card catalog in the library.

 

Incorrect:  Until he came to the United States to study, he didn’t know to cook.

Correct  :  Until he came to the United States to study, he didn’t know how to cook.

 

Incorrect:  Do you know to type?

Correct  :  Do you know how to type?

 

Incorrect:  You’ll have to help her because she doesn’t know to do it.

Correct  :  You’ll have to help her because she doesn’t know how to do it.