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UNIT 2 — TRAVEL — Lesson 3A
Compound Sentences


In order to do the exercises and activities in this lesson, you need to know the concepts explained in the reference tools listed here. Please review these sections. If you do not understand something, please ask your teacher.

Grammar & Structure:

In Unit 1 you learned about writing simple sentences about daily routine.


Father plays the piano. Susan plays the guitar.

In this unit you will learn skills to help you write compound sentences: two sentences joined together to make one sentence.


Father plays the piano, and Susan plays the guitar.


Using compound sentences will improve the level of your writing. In this Lesson you will use compound sentences to describe travelling.

Look at the following sentences:

Sarah took a bus to Toronto.
Susan flew to Vancouver.

Both sentences have a subject and a verb, so they are complete sentences. You can join the sentences together to make a compound sentence.

Sarah took a bus to Toronto, and Susan flew to Vancouver.

In this compound sentence, the two sentences are joined with the conjunction "and".

Compound sentences:

  • are combined with certain conjunctions.
  • use commas to separate the two simple sentences.
  • use commas usually before the conjunction.
  • use the conjunctions "and", "but", "yet", "or", "nor", "so", and "for" (each conjunction has its own function and shows the relationship between the two sentences: addition (more information), contrast (opposite information), choice, cause (reason), result. The following chart shows the function of each conjunction.)
  • use a pronoun (I, you, he, she, it, we, they) if the subject is the same in both sentences.

Remember, a sentence with two subjects needs a plural verb.


Maria and Jorge are on vacation, so they are in Mexico.


Conjunctions Table

Function Conjunction Example
more information and Steve bought postcards, and information Jane bought a t-shirt.

or (positive)

I think Joe visited Spain, or maybe he went to Italy.

nor (negative) Joe didn't go to Turkey, nor did he go to Greece.
opposite information but/yet Joe visited Spain, but John visited Victoria.
reason for John visited Victoria, for he thought it was beautiful.
result so The weather was bad, so the plane left late.