Silve(目從)接過去式子句,另外一句(主要子句)是現在完成式
例 Many terrorist attacks have occurred these months.
(最近幾個月以來多起恐怖攻擊發生。)
The way people communicate has changed since smartphones became popular.
(自從智慧型手機普及,人們的通訊方式就變了。)
例We have been learning English for ten years. (我們已經學英文十年了。)
例
⇒ have been learning 表示未來還會繼續學下去。
ⓐ 自從政府呼籲資源回收,垃圾量就減少了。
Since
Government urged recycling,
the
called for
the
考點 過去完成式
been
quantities of garbage has reduced.
◎ 兩個動作、狀態發生在過去:
先發生 > 用過去完成式(had+p.p.)
後發生 > 用過去簡單式
一個句子裡必須有兩個動詞,而且有明確的先後順序才可能有過去完成式
