Comparison of simple, complex and compound sentence
—Simple sentence
—Complex sentence
—Compound sentence
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Simple sentence
—consists of one clause only
—all sentence elements are expressed by phrases
—He came here after work.
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Complex sentence
—consists of one matrix and at least one dependent clause
—at least one sentence element must be expressed by a clause
—He came here when he finished his work.
—When he finished his work, he came here.

Compound sentence
—consists of two matrix clauses and any number of dependent clauses
—He finished his work and (he) came here.
—He finished his work and came here when I asked him to.
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