Understanding Can, Be Able To, Know How To

Which of the following sentences correctly uses "can" to express ability?

• She can play the piano.

• She can to play the piano.

• She can playing the piano.

• She can played the piano.

Which phrase means "to have the skill to do something"?

• Can

• Be able to

• Know how to

• Must

Choose the correct form to complete the sentence: "By next year, I _____ speak French fluently."

• can

• will be able to

• know how to

• am can

Which sentence correctly uses "know how to"?

• I know how to swim.

• I know how swim.

• I know how swimming.

• I know how to swimming.

Select the sentence that uses "be able to" for a past ability.

• I can run fast when I was a child.

• I was able to run fast when I was a child.

• I am able to run fast when I was a child.

• I know how to run fast when I was a child.

Which of the following sentences is NOT correct?

• She can drive a car.

• She is able to drive a car.

• She knows how to drive a car.

• She can to drive a car.

Choose the best option to complete the sentence: "He _____ solve this math problem because he _____ the formula."

• can; knows how to use

• can; is able to use

• is able to; can use

• knows how to; can use

Which sentence best shows the difference between "can" and "know how to"?

• I can cook, but I don't know how to bake bread.

• I can cook and I can bake bread.

• I know how to cook and I know how to bake bread.

• I am able to cook and bake bread.

You want to express that someone learned a skill in the past and now has the ability. Which is the best sentence?

• She can swim since last year.

• She is able to swim since last year.

• She has been able to swim since last year.

• She knows how swim since last year.

Which sentence uses "be able to" to express a specific achievement in the past?

• I can finish the project yesterday.

• I was able to finish the project yesterday.

• I am able to finish the project yesterday.

• I know how to finish the project yesterday.