How long has she been playing computer?(four hours)

She has been playing computer for four hours.

have / has 是助动词 been 是 be 的过去分词

表示从过去开始一直持续到现在的动作，并有可能持续下去．

时态－现在完成进行时（一）构成形式：

have / has been + Ving

for + 一段时间

have / has been + doing sth + since + 过去的时间点

since + 从句 ( 一般过去时 )

例句 1 我已经学了５年的英语了．I have be learning English for 5 years.

例句 2 他已经集邮 10 年了．He has been collect stamps for 10 years.He have been collecting stamps since 10 years ago.He has been collecting stamps for 1999.

画线部分提问：How long has he been collecting stamps?

Read the passage and then complete the table3a

Name Has been skating for

Alison 5 hours

Sam 4 hoursLu Ning 4 hoursLi Chen 1 hour

1. Why are students skating?

2. How much does each student raise for every

hour they skate?

3. How long has the skating marathon been going?

4. Who was the first to start?

5. How long has he been skating?

Reading – Section A 3a

To raise money for charity.

Ten yuan.

For five hours.

Alison was the first to start.

He has been skating for five hours.

6. How long have Sam and Lu Ning been skating?

7. Who was the last one?

8. When did he start?

9.How long has he been skating?

They have been skating for four hours.

Li Chen was the last one.

He started an hour ago.

He has been skating for an hour.

for whole raise to skate still has

I’m talking you from the Hilltop School Skating Marathon. Here, students are skating to raise money for charity. For every hour they , each student ten yuan for charity. The skating marathon been going for five hours now, and several skaters are skating. Alison was the first one to start, and has been skating for the five hours. Next is Sam, and he has been skating four hours. Lu Ning has been skating for four hours too, and Li Chen just started an hour ago.

to

skate raiseshas

stillwhole

for

9am 10am 11am 12am 1pm 2pm

AlisonSam

Lu NingLi Chen

It’s now 2pm.Write the students’ names from activity 3a on the time line.

3b