Know and know how

                          Knowledge and Ability – Know and know how:

         Remember that “know” followed by a noun expresses knowledge. On the other hand,  

       “know how” followed by an infinitive expresses ability. Avoid using infinitive after know.

        Examples:

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

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

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

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

         

           3.       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.

         

           4.       Incorrect: Do you know to type?

        Correct: Do you know how to type?

         

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

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

         

           6.       I know the answer.