Ngữ pháp tốt là quan trọng, cho dù bạn muốn phát triển nghề nghiệp của bạn, tăng điểm trung bình của bạn, hoặc tăng số điểm SAT của bạn hoặc ACT. Thực hành là chìa khóa để nâng cao kỹ năng ngữ pháp của bạn, và đó là những gì bảng tính này là tất cả về. Mở nó và bạn sẽ tìm thấy hàng trăm các vấn đề vui vẻ để giúp đỡ xây dựng cơ ngữ pháp của bạn. | Chapter 1 Placing the Proper Verb in the Proper Place 17 Answers to Problems on Verbs and Verb Tenses a selects. Notice the time clues The first part of the sentence contains the word is a presenttense verb and the second part includes the word always. Clearly you re in the present with a recurring action. b challenged. Another time clue last year s places you in the past. B is buying or buys. The second verb in the sentence is takes you right into the store with David watching the unfolding action. Present progressive tense gives a sense of immediacy so is buying makes sense. The plain present tense buys works nicely also. d will flatter. The key here is next which puts the sentence in the future. B is writing. The time clue right now indicates an ongoing action so the present progressive form is writing works well here. b purchased. Diane s bad taste splurge happened once which means it took place in the past. B was charging or charged. The second part of the sentence includes the verb urged which places you in the past. I like the past progressive was charging here because the word while takes you into the process of charging which went on over a period of time. However the sentence makes sense even when the process isn t emphasized so charged is also an option. h muttered or was muttering. The clue to the past is two days after. The second answer gives more of a you are there feel but either is correct. i will invest. The time words here as soon as tell you that the action hasn t happened yet. j chimed. If David gave you re in past tense. U placed. The first verb in the sentence received is in the past tense so you know that the action of placing the award on the shelf is also in past tense. l wonder. The time clue here is every day which tells you that this action is still happening at the present time and should be in present tense. mi explained. The yesterday is a dead giveaway go for past tense. n stated. The saga of Grace and Diane s award is in past tense
