现在完成进行时的基本结构

现在完成进行时由“have/has been + 动词-ing”构成。例如：

- I have been studying English for two hours.

- She has been working in the garden since this morning.

练习题

1. 单项选择

( ) 1. Tom ________ his homework since he got home.

a) has done

b) is doing

c) has been doing

( ) 2. We ________ the party preparations all afternoon.

a) have finished

b) have been finishing

c) have been preparing

2. 完成句子

1. They ________ (wait) for the bus for over an hour.

2. She ________ (write) letters to her friends since lunchtime.

参考答案

单项选择

1. c) has been doing

2. c) have been preparing

完成句子

1. have been waiting

2. has been writing

通过这些练习，希望能帮助大家更熟练地运用现在完成进行时。记住，这种时态强调的是动作的持续性和未完成性，通常会提到一个具体的时间点或时间段。继续多做练习，你会发现语法变得越来越简单！