Need作实义动词和情态动词时有何区别

Question

给出例句加以说明

Answer 1

need v.
做实意动词时，有两种用法：
1.need to do sth.需要做某事
e.g I need to study hard for th exam.我需要为了考试努力学习。
He needed to drink some water.他需要喝些水。
2.need doing sth. 需要被做某事（=need to be done sth.）
e.g The flowers need watering every day.花需要每天（被）浇水。
=The flowers need to be watered every day.
The classroom needs cleaning.教室需要（被）打扫。
=The classroom needs to be cleaned.
做情态动词时，通常只用疑问式或否定式。
其否定式常用于回答Must 的疑问句
e.g -Must I finish it today?
-No,you needn't
其疑问式用于构成疑问句
e.g -Need I wear a coat?
-Sure,it's cold.

Answer 2

意思基本上是一样的

need z作为情态动词和实义动词的区别就是用法

作为实义动词：need to do sth  

作为情态动词：need do sth

need v.

做实义动词时，有两种用法：

need to do sth.需要做某事

e.g I need to study hard for th exam.我需要为了考试努力学习

2.need doing sth. 需要被做某事（=need to be done sth.）

e.g The flowers need watering every day.花需要每天（被）浇水。

=The flowers need to be watered every day.

做情态动词时，通常只用疑问式或否定式。

其否定式常用于回答Must 的疑问句

e.g -Must I finish it today?

-No,you needn't

其疑问式用于构成疑问句

e.g -Need I wear a coat?

-Sure,it's cold.

Answer 3

意思基本上是一样的

need z作为情态动词和实义动词的区别就是用法

作为实义动词：need to do sth

作为情态动词：need do sth

need v.

做实义动词时，有两种用法：

need to do sth.需要做某事

e.g I need to study hard for th exam.我需要为了考试努力学习

2.need doing sth. 需要被做某事（=need to be done sth.）

e.g The flowers need watering every day.花需要每天（被）浇水。

=The flowers need to be watered every day.

做情态动词时，通常只用疑问式或否定式。

其否定式常用于回答Must 的疑问句

e.g -Must I finish it today?

-No,you needn't

其疑问式用于构成疑问句

e.g -Need I wear a coat?

-Sure,it's cold.