文法書CH3

1. At present a new road __ in that part of the city.
(A) is building
(B) will be built
(C) will have built
(D) is being built

ps. At present表現在，故排除b和c，被動式所以選d

2. There ___ some very bad storms recently.
(A) is
(B) are

(C) have been

(D) have

ps. Recently表示不久前到現在，應用現在完成式。表示」有」的觀念應用There is/are 的句型，其現在完成式即是have been

3. The whole area was flooded because it ___ for weeks.
(A) rains
(B) has rained

(C) had been raining

(D) was raining

ps.從主要子句was flooded可看出，淹水是過去時間，造成淹水的原因」下雨」只能在淹水之前發生，所以應該用過去完成式。

4. By next Sunday you ___ with us for three months.

(A) will have stayed

(B) will stay
(C) shall stay
(D) have stayed

ps.介係詞by表示」到…為止」，應用完程式，因而排除簡單式的b和c

5. We could smell that someone ___ a cigar.
(A) would be smoking
(B) was smoked

(C)had been smoking

(D) would be smoked

Ps.主詞someone和動詞smoke配合應用主動態，刪除b和d。而A的would'be smoking表示將抽未抽，如此則和we could smell有衝突，所以選c，表示那之前已經有人在抽，才會留下味道。