现在完成时
现在完成时用于连接过去和现在。我们用have / has + 过去分词来构成它。对于大多数动词，过去分词与过去式相同（例如，play → played）。
一些动词改变拼写（例如，study → studied），许多是不规则的（例如，go → gone、write → written）。您可以在下面的相关课程中找到不规则动词的完整列表。
如何形成现在完成时
肯定句
要形成肯定句，使用have / has + 过去分词。
| 完整形式 | 缩写形式 |
|---|---|
| I have played | I've played |
| You have worked | You've worked |
| He has written | He's written |
| She has walked | She's walked |
| It has rained | It's rained |
| We have travelled | We've travelled |
| They have studied | They've studied |
否定句
要形成否定句，在have或has后添加not。
| 完整形式 | 缩写形式 |
|---|---|
| I have not eaten breakfast today | I haven't eaten |
| You have not been to Asia | You haven't been |
| He has not seen the new film | He hasn't seen |
| She has not played tennis | She hasn't played |
| It has not snowed this winter | It hasn't snowed |
| We have not slept all night | We haven't slept |
| They have not tried the food | They haven't tried |
是/否问句
要形成问句，将have / has放在主语前面。
例句：
- Have I missed the bus?
- Have you visited London?
- Has he worked as a waiter before?
- Has she met John?
- Has it been cold this week?
- Have we arrived too early?
- Have they studied English grammar before?
疑问词问句
对于疑问词问句，将疑问词放在have / has之前。
例句：
- Where have I left my umbrella?
- What have you done today?
- Why has he gone already?
- Where has she been in the UK?
- Why has it rained so much this summer?
- What have we done?
- Where have they learned English before?
何时使用现在完成时？
重点关注用法： 如何使用现在完成时
练习题
Quizzes for this lesson will be available soon. We are currently preparing the question set and will publish it as soon as possible.
Downloadable PDF
PDF versions for this lesson will be available soon. We are currently preparing the materials and will make them accessible as soon as possible.
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