reading a book为什么与go for a walk, eat dinner不同类？

go shopping,reading a book,go for a walk选不同的一项。

1. A 2. B 3. A 4. B 5. C

reading a book

看书；正在读书；正在看书

例句

1.Reading a book is just as if we are communicating with a good friend.
看每一本书就像在跟一个好朋友交流。

2.We then see her propped up in bed happily reading a book.
然后，我们看到她靠在床上愉快地看书。

3.Try reading a book, having a cup of caffeine-free tea, listening to soothing music or taking a hot bath before heading to bed for the night.
读点书，喝杯不含咖啡因的茶，听听舒缓的音乐或洗一个热水澡。

4.What was he going? He may be reading a book in the garden.
他那时在做什么？他可能在花园里读书。

5.I found a boy was reading a book about history three days ago.
三天前，我发现一个男孩在读一本关于历史的书。

reading a book是动词的现在分词短语或动名词短语，go for a walk 和eat dinner都是动词原形构成的短语。

reading a book，属于动名词形式，英语中将动词原形变为doing形式，可以把动词名义化。所以，从词性上来说，reading a book是名词，其他是动词短语（动宾结构），故不同类

因为reading a book中的reading是动名词。
而其他的都是动词原形。
希望能帮到你！

因为reading a book 只是看书静态，go for a walk, eat dinner 都是有些动作为动态。

因为 reading a book 中的reading是现在分词
go for a walk与 eat dinner 是动词短语 ，动词原形开头