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In grammar, clause structure refers to the classification of sentences based on the number and kind of clauses in their syntactic structure. Such division is an element of traditional grammar. A ''simple sentence'' consists of only one clause. A ''compound sentence'' consists of two or more independent clauses. A ''complex sentence'' has at least one independent clause plus at least one dependent clause. A set of words with no independent clause may be an ''incomplete sentence'', also called a ''sentence fragment''. A sentence consisting of at least one dependent clauses and at least two independent clauses may be called a ''complex-compound sentence'' or ''compound-complex sentence''. Sentence 1 is an example of a simple sentence. Sentence 2 is compound because "so" is considered a coordinating conjunction in English, and sentence 3 is complex. Sentence 4 is compound-complex (also known as complex-compound). Example 5 is a sentence fragment. #''I like pumpkin pie.'' #''I don't know how to bake, so I buy my sweets.'' #''I enjoyed the apple pie that you bought for me.'' #''The dog lived in the garden, but the cat, who was smarter, lived inside the house.'' #''What a silly.'' The simple sentence in example 1 contains one clause. Example two has two clauses (''I don't know how to bake'' and ''I buy my sweets''), combined into a single sentence with the coordinating conjunction ''so''. In example 3, ''I enjoyed the apple pie'' is an independent clause, and ''that you bought for me'' is a dependent clause; the sentence is thus complex. In sentence 4, ''The dog lived in the garden'' and ''the cat lived inside the house'' are both independent clauses; ''who was smarter'' is a dependent clause. Example 5 features a noun phrase but no verb. It is not a grammatically complete clause. ==Simple sentences== A simple sentence structure contains one independent clause and no dependent clauses. *''I run.'' This simple sentence has one independent clause which contains one subject, ''I'', and one predicate, ''run''. *''The girl ran into her bedroom.'' This simple sentence has one independent clause which contains one subject, ''girl'', and one predicate, ''ran into her bedroom''. The predicate is a verb phrase that consists of more than one word. *''In the backyard, the dog barked and howled at the cat.'' This simple sentence has one independent clause which contains one subject, ''dog'', and one predicate, ''barked and howled at the cat''. This predicate has two verbs, known as a compound predicate: ''barked'' and ''howled''. This compound verb should not be confused with a compound sentence. ''In the backyard'' and ''at the cat'' are prepositional phrases. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sentence clause structure」の詳細全文を読む スポンサード リンク
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