| 释义 |
past GRAMMARHpB:st, $pAstn [U], adj [before n; not gradable](of) the form of a verb used to describe actions, events or states that happened or existed before the present time（动词的）过去式The past of 'change'is 'changed'.change的过去式是changed。'Must' doesn't have a past form.Must没有过去式。The past continuous (or past progressive) is the grammatical tense used to describe an action which someone was doing at a particular time. It is made with was or were and the -ing form of a verb.过去进行时: ‘I was cooking’is an example of the past continuous. “I was cooking”是过去进行时的一个例子。The past participle of a verb is the form, usually made by adding -ed, which is used in some grammatical structures such as the passive or PERFECT tenses.过去分词The past participle of 'cook' is 'cooked'.cook这个字的过去分词是cooked。The past perfect (or pluperfect) is the grammatical tense used to describe an action that had already finished when another action happened. It is made with had and a past participle.过去完成时： ‘I had just cooked’is an example of the past perfect, and ‘I had just been cooking’is an example of the past perfect continuous. I had just cooked是过去完成时的一个例子，而I had just been cooking是过去完成进行时的一个例子。The past simple (or simple past) is the form of a verb used to describe an action which happened before the present time and is no longer happening. It is usually made by adding -ed.一般过去式： The past simple of ‘cook’is ‘cooked’. cook的一般过去式是cooked。Past tense is used generally to describe grammatical structures that describe actions which have now finished. It is used by some people to refer to the past simple.过去时（一般过去时）I think her husband must be dead -- she always talks about him in the past tense.我想她丈夫一定死了----她老是用过去时态谈到他。.
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