老师解释了限定动词和非限定动词之间的区别。

The teacher explained the difference between finite and non-finite verbs.

非限定动词形式包括不定式、分词和动名词。

The non-finite verb forms include infinitives, participles, and gerunds.

在英语中，非限定动词不会根据主语而变化。

In English, non-finite verbs do not change according to the subject.

理解非限定动词对于掌握英语语法至关重要。

Understanding non-finite verbs is crucial for mastering English grammar.

简单句是含有一个限定动词（而且仅含一个）的句子。

A Simple sentence is one that contains a finite verb (and only one finite verb).

简单句是含有一个限定动词 ( 而且仅含一个 ) 的句子.

A Simple sentence is one that contains a finite verb ( and only one finite verb ).

简单句是含有一个限定动词的句子。

A Simple sentence is one that contains a finite verb.

形成句子语法成分但不含限定动词的表达式。

An expression forming a grammatical constituent of a sentence but not containing a finite verb.

英语小句中非限定动词的选择问题一直是困扰中外学者的难点之一。

The choice of a non-finite verb form after the main verb in an English clause has been one of the trickiest problems in English grammar.

片语是构成一个语法单位的一组词，它没有限定动词，也不存在主述结构。

A phrase does not contain a finite verb and does not have a subject-predicate structure.