SAT文法知識點第3期

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。