加粗并带下划线的是词尾。◆标出不合规则的形式。
直陈式
Present simple现在时
| I | exist |
|---|
| you | exist |
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| he/she/it | exists |
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| we | exist |
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| you | exist |
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| they | exist |
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详见： 一般现在时（Simple Present）
Past simple完成的过去
| I | existed |
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| you | existed |
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| he/she/it | existed |
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| we | existed |
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| you | existed |
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| they | existed |
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详见： 一般过去时（Simple Past）
Present perfect完成时
| I | have existed |
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| you | have existed |
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| he/she/it | has existed |
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| we | have existed |
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| you | have existed |
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| they | have existed |
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详见： 现在完成时（Present Perfect）
Past perfect过去完成时
| I | had existed |
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| you | had existed |
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| he/she/it | had existed |
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| we | had existed |
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| you | had existed |
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| they | had existed |
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详见： 过去完成时（Past Perfect）
Future (will)将来时
| I | will exist |
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| you | will exist |
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| he/she/it | will exist |
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| we | will exist |
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| you | will exist |
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| they | will exist |
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详见： will
Future perfect将来完成时
| I | will have existed |
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| you | will have existed |
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| he/she/it | will have existed |
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| we | will have existed |
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| you | will have existed |
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| they | will have existed |
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条件式
Conditional (would)条件式
| I | would exist |
|---|
| you | would exist |
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| he/she/it | would exist |
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| we | would exist |
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| you | would exist |
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| they | would exist |
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详见： 第二类条件句（if 从句第 2 类）
Conditional perfect过去条件式
| I | would have existed |
|---|
| you | would have existed |
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| he/she/it | would have existed |
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| we | would have existed |
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| you | would have existed |
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| they | would have existed |
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进行时
Present progressive现在进行时
| I | am existing |
|---|
| you | are existing |
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| he/she/it | is existing |
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| we | are existing |
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| you | are existing |
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| they | are existing |
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详见： 现在进行时（Present Progressive）
Past progressive过去进行时
| I | was existing |
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| you | were existing |
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| he/she/it | was existing |
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| we | were existing |
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| you | were existing |
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| they | were existing |
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详见： 过去进行时（Past Progressive）
Present perfect progressive现在完成进行时
| I | have been existing |
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| you | have been existing |
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| he/she/it | has been existing |
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| we | have been existing |
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| you | have been existing |
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| they | have been existing |
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详见： 现在完成进行时（Present Perfect Progressive）
Past perfect progressive过去完成进行时
| I | had been existing |
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| you | had been existing |
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| he/she/it | had been existing |
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| we | had been existing |
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| you | had been existing |
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| they | had been existing |
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Future progressive将来进行时
| I | will be existing |
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| you | will be existing |
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| he/she/it | will be existing |
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| we | will be existing |
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| you | will be existing |
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| they | will be existing |
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非限定形式
Infinitive and participles不定式、动名词、分词
| infinitive | exist |
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| to-infinitive | to exist |
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| -ing form | existing |
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| past participle | existed |
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详见： 不规则动词 · 动词后接 -ing
课程中的例句
每个句子都来自本课程的词表或语法专题。动词形式已标出，下面写着它是哪个时态、哪个人称。
The apparatus did not exist when he wrote.他写作的时候，这种装置还不存在。
exist — Present simple · I; Present simple · you
The instrument that would have shown it did not exist.本可以显示出这一点的仪器当时还不存在。
exist — Present simple · I; Present simple · you
快速练习
5个填空，先来自上面的例句，再来自变位表。每个回答都会计入你的复习。
这些形式按语言规则算出——两遍，用两种互相独立的方法——并且和本课程里所有手写的形式核对过。例句都是本课程自己的句子。
