我近期在学新编《新编英语语法课程》，在书中提到的动词词组的定义是:
动词词组是以主动词为中心词的词组。动词词组可能只包含一个主动词或者主动词带修饰语，这叫做“简单动词词组”。比如：
She looks pale.
John arrived last night.
They fully appreciate our problems.
We utterly detested him.
动词词组也可以由一个或一个以上的助动词加主动词构成，这叫做“复杂动词词组” a Wilty:
It is getting dark.
She ought to have told him about it.
The children might have been playing in the garden.
复杂动词词组也可带有修饰语。比如：
Joan will certainly object and so will Mary.
I have rarely reviewed a more dishonest book.
He may really have injured innocent people
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在之前的学习中比如look after/take off 这种动词＋介词的种类应该是动词短语，那样在句子成分的剖析中如何剖析动词词组、动词短语和短语动词呢?
解答如下：仅供参考！
【一】动词词组：带有修饰词的动词叫作“动词词组”即带有状语修饰语的动词称作为动词词组。
The dog died suddenly yesterday.这条狗昨天忽然去世了。
备注：died suddenly yesterday叫作动词词组。
备注：suddenly修饰谓语动词died作方法状语。
备注：yesterday修饰谓语动词died作时间状语。
【二】动词短语:后面带有名词和介词的动词叫作“动词短语”即由动词+名词+介词构成的叫动词短语：
take the place of 代替；take care of 照顾/照看
These new facilities will take the place of the old ones.
这类新设施将代替那些旧的。
I will take care of them to the best of my abilities.
我将尽我所能地照顾他们。
备注：动词短语：短语为中心词，动词为修饰词。
【三】短语动词：由动词+介词或者由动词+小品副词构成叫短语动词。look after照顾; take off 脱掉
Mary looked after her sick mother at home yesterday.【look after 为动词+介词 结构】
玛丽昨天在家照顾她生病的母亲。备注：动词+介词结构，其宾语只能放在介词后面。
She took off her spectacles. 她摘下了眼镜。【take off为动词+副词结构】
备注：动词+小品副词结构，其宾语可以放在副词后面也可以放在副词前面，若是代词只能放在中间。
备注：短语动词，动词为中心词，短语为修饰词。
温馨提示：以上解答只是个人看法和理解。仅供参考！
