新航道上海學(xué)校SAT培訓(xùn)班小編繼續(xù)給大家?guī)鞸AT文法第三期，每期分享3-5個文法知識點，幫助大家更好地備考SAT。

  一、動詞

  時態(tài)一致

  1. 含義：

  前后句的時態(tài)要保持一致。

  例如：People are queuing for the test right now so the organizer is asking everyone to wear masks.

  2. 用法：

  (1) 現(xiàn)在時

  (1) 現(xiàn)在時

  a) 一般現(xiàn)在時

  i. 定義：經(jīng)常性或習(xí)慣性的動作;普遍真理或一般規(guī)律。

  ii. 動詞形式：do/ does/ am/ is/ are

  iii. 例句：

  1. We often play football there.

  2. I am a slow walker, but I never walk backwards.

  3. The sun rises and the sun sets.

  b) 現(xiàn)在進(jìn)行時

  i. 定義：此時此刻或目前一個階段正在進(jìn)行的動作;計劃想要進(jìn)行的動作。

  ii. 動詞形式：am/is/are doing

  iii. 例句：

  1. I am doing all I can to add value to the life of everyone I touch.

  2. We are leaving on Friday?

  3. He is always thinking of helping others.

  c) 現(xiàn)在完成時

  i. 定義：過去發(fā)生或已經(jīng)完成的動作對現(xiàn)在造成的影響或結(jié)果，或從過去持續(xù)到現(xiàn)在的動作或狀態(tài).

  ii. 標(biāo)志詞：already，by far，till now，since…，in/over/during/for the past/last...days/weeks/years…

  iii. 動詞形式：have/has done

  iv. 例句：

  Qingdao has changed a lot in the last several years.

  d) 一般將來時

  i. 定義：將來發(fā)生的動作或狀態(tài);打算、計劃或準(zhǔn)備做某事。

  ii. 例句：

  1. It will rain tomorrow.

  2. I am going to challenge myself.

  真題檢測

  真題檢測 1

  (2022-03AS-Q5) In other words, the scientists wondered whether dogs have expectations of what they search for or whether they simply have followed a trail of positive stimuli.

  A. NO CHANGE

  B. follow

  C. will have followed

  D. followed

  解析：通過前半句whether dogs have expectations看出have是一般現(xiàn)在時，根據(jù)前后句的時態(tài)要保持一致的原則，后面的句子也要是一般現(xiàn)在時，所以排除A/C/D三個選項，所以選B。

  注：2022-03AS-Q5為2022年3月亞太真題第5題。

  真題檢測 2

  (2022-03AS-Q22) The results of the study certainly support Suveyke’s assertions that the career of a merchandise buyer is one that mixed creativity with business acumen all in a day’s work.

  A. NO CHANGE

  B. was mixing

  C. mixes

  D. had mixed

  解析：通過the career of a merchandise buyer is one看出is是一般現(xiàn)在時，根據(jù)前后句的時態(tài)要保持一致的原則，后面的句子也要是一般現(xiàn)在時，所以排除A/B/D三個選項，所以選C。

  注：2022-03AS-Q22為2022年3月亞太真題第22題。

  真題檢測 3

  (2022-03AS-Q25) Proponents of the double-degenerate mode hypothesizes that in some cases the companion white dwarf survives and is propelled away with a velocity equal to its orbital velocity prior to the explosion.

  A. NO CHANGE

  B. has hypothesized

  C. hypothesize

  D. is hypothesizing

  解析：通過and is propelled away with a velocity看出is是一般現(xiàn)在時，根據(jù)前后句的時態(tài)要保持一致的原則，前面的句子也要是一般現(xiàn)在時，所以排除A/B/D三個選項，所以選C。

  注：2022-03AS-Q25為2022年3月亞太真題第25題。

  真題檢測 4

  (2022-03AS-Q40) For each of those years, from 2014 to 2114, a noted author is to be asked to contribute an original piece of writing: each work is to be held securely.

  A. NO CHANGE

  B. are being

  C. were

  D. have been

  解析：通過each work is to be held securely看出is to be是表示計劃，根據(jù)前后句的時態(tài)要保持一致的原則，前面的句子也要是表示計劃，所以排除B/C/D三個選項，所以選A。

  注：2022-03AS-Q40為2022年3月亞太真題第40題。

  以上就是SAT文法第一期，更多關(guān)于SAT知識點及相關(guān)資料，請關(guān)注新航道上海學(xué)校。

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