U1 Lesson 4（word教案）-【优翼·学练优】2026-2027学年九年级英语上册同步备课（人教版·新教材）

1. Show students two photos of your city and let them compare the change.
2. Write some sentences that students see from the photos to guide comparison:

       Ten years ago, this place was a busy street market.

       Now, the city has built a large shopping mall here.

       Many small shops used to be here, but they have been replaced by modern stores.

4a

1. Let students read the three sentence pairs and circle the verbs. Guide students to observe and compare the verb tenses in each pair. Ask:

       Which sentences talk about a finished time in the past?

       Which sentences talk about something that happened in the past but is still important now?

2. Help students summarize the basic difference:

Simple Past: for actions that happened and finished at a specific time in the past e.g., yesterday, last week, 20 years ago)..

Present Perfect: for actions that happened at an unspecified time in the past, or actions that started in the past and continue to now (often with ever, never, just, already, yet, for, since).

一般过去时与现在完成时的区别

1. 时间是否明确、是否与现在切断

一般过去时：动作发生在过去的某个确定时间点 / 时间段，已经结束，和现在没有关系。可以搭配具体过去时间。现在完成时：不强调具体时间，只强调过去动作与现在的关联（影响、结果、持续）。不能搭配具体过去时间状语（yesterday, last year, in 2019 等）。例如：

He moved to Beijing in 2022. （一般过去时，有明确时间）

He has moved to Beijing. （现在完成时，无具体时间，强调现在在北京）

He has moved to Beijing in 2022. （错误，现在完成时不能加具体过去时间）

2. 强调的侧重点不同

一般过去时：侧重陈述过去发生的事实，只告诉别人 “做过这件事”，不关心对现在的影响。现在完成时：侧重过去动作带来的现在结果，或动作持续到现在。例如：

I lost my key yesterday.（一般过去时：只陈述过去的事实，不说明现在找没找到）

I have lost my key.（现在完成时：强调现在的结果—我现在没有钥匙，进不了门）