(1) 過去進(jìn)行時(shí)強(qiáng)調(diào)動(dòng)作在過去某時(shí)刻正在進(jìn)行或持續(xù)，而一般過去時(shí)表示動(dòng)作的完成。如： He was writing his composition last night. 他昨晚在寫作文。(不一定寫完)
He wrote his composition last night. 他昨晚寫了一篇作文。(已經(jīng)寫完)
(2) 表示過去的狀態(tài)、感覺及心理活動(dòng)的靜態(tài)動(dòng)詞(如be, like, love, hate, fear, own, hear, see, know, want, notice)可用于一般過去時(shí)，但通常不用于進(jìn)行時(shí)。如：
I hated it when a man spoke with his mouth full of food. 我討厭人們說話時(shí)口里含著食物。
(3) 一般過去時(shí)與always, constantly, forever, continually等連用，表示"過去經(jīng)常性、習(xí)慣性的動(dòng)作";而過去進(jìn)行時(shí)與always, constantly, forever, continually等連用，表示動(dòng)作的重復(fù)，常帶有感****彩。如：
He always got up at six. 他過去總是六點(diǎn)起床。
He was always thinking of his work. 他總是一心想到工作。
(4) 有時(shí)過去進(jìn)行時(shí)可以用來替換一般過去時(shí)，但一般過去時(shí)表示主語的行為是經(jīng)過認(rèn)真考慮的;而過去進(jìn)行時(shí)表示一種較隨便或沒有進(jìn)行仔細(xì)考慮的行為。如：
I thought that he would agree with us. 我原以為它會(huì)同意我們的。
I was thinking of persuading him to follow my advice. 我想到了要說服他接受我們的建議。
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