90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.
Can is usually followed by an infinitive without “to”: I can speak French. Sometimes it is used without a following infinitive: ♦ Come and help us, if you can.
Can does not change its form, so the third person singular form does not end in “-s”: She can speak Japanese.
Questions and negatives are formed without “do”: Can you swim?
The negative form of can is cannot: We cannot allow this behavior to continue.Cannot is often shortened in conversation or informal writing to can’t: ♦ I can’t find my brown jacket.
Can is often used in tag questions: They can’t hear us, can they?
Can has no participles and no infinitive form. Be able to is used as the infinitive to show ability or possibility: I want to be able to choose my own career.
Could is used as the past tense of can when it means that someone had the ability to do something, or that something was possible: New York was a place where anyone could start a business. But was/were able to is used for saying that someone actually succeeded in doing something: ♦ By climbing on the table he was able to reach the window.
There is no future tense of can, but will be able to is used for saying that someone will have the ability to do something or that something will be possible in the future, especially after a long time: She’ll be able to walk soon. ♦ A hundred years from now people will be able to visit Mars.Can is usually used when planning or deciding about the near future: ♦ We can go shopping tomorrow.
There is no perfect tense of can, so has/have been able to is used: I haven’t been able to call my parents yet.