完全句（Full Sentence），按其结构形式，又可分为简单句（Simple Sentence）、并列句（Compound Sentence）、复杂句（Complex Sentence）和并列复杂句（Compound-complex Sentence）。

1.简单句指只包含一个主谓结构而且各个成分均由词组构成的句子。

A simple sentence is a sentence that comprises only one independent clause.

eg:The students  have made  better grades  in the past few weeks.

         S          V          O                  A

如果构成分句成分的词组本身带有从属分句，那么这个句子仍然是简单句。

eg:The students I teach  have made  better grades  in the past few weeks.

              S              V            O                  A

2.并列句指两个或两个以上的简单句由并列连词或其他并列手段连接起来构成的句子。

Two or more coordinated independent clauses make a compound sentence.

注：（并列句是主句之间的并列，而不是从句。）

eg:I'm a teacher,but they are not.(并列句---主句之间的并列）

He told me that he was very busy and that he had no time to go with me.（复杂句---从句之间的并列）

3.复杂句指运用从句充当句子成分（主、宾、状、补）的一个单句。

When an independent clause comprises one or more dependent clauses as its element(s),this makes a complex sentence.

限定从属分句

eg:What you said is true.(S)

I don't know what you mean.(O)

You will be punished if you do that again.(A)

The problem is that I don't have enough money.(SC)

4.一个并列句，如果包含一个或一个以上的复杂句作为并列成分，这便是并列复杂句。

Two or more coordinated independent clauses with at least one complex clause make a compound-complex sentence.

eg:You and me who are from one wolrd  are  family  and we  travelled  for a dream and

                    S                  V      C       S        V             O   

went to  Binjing  when it was August.

   V       A             A