a / an 　 abbreviations 　 about / on 　 able 　 about to do / on the verge of / on the point of 　 above / over 　 according to 　 across / over 　 act / action 　 ago / since / for 　 all / all of 　 all / every 　 all / whole 　 almost / nearly 　 aloud / loudly 　 also / too / as well / as well as 　 A.M. / P.M. 　 among / between 　 another 　 any / no 　 around / about 　 as / like 　 as it is / as it was / as it were

be able to do 　 　 A. able은 능동태 문장에서  to 부정사 앞에 오며 일반적인 능력으로 ...할 수 있다를 의미한다. 1. John is able to run fast. 2. John was able to read music after just a few lessons. 3. Will you be able to come next week? 4. I wasn't able to hear the speaker. 5. John is expected to be able to play again next weekend. 6. After the surgery, he was able to walk again. 7. A cat is able to see in the dark. 8. She is able to take care of herself. 9. He is now able to earn a living. 10. In a few days, the baby will be able to walk. 11. In 1944, we were able to return to Hawaii. 12. He still isn't able to make a living from acting. 　 　 B. be able to do의 to 부정사 구문은 수동태로는 사용되지 않는다. X John is able to be seen.

John is able to run fast. 　 　 In a few days, the baby will be able to walk.

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