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Grade 3 English · Unit 2: Grammar

Conjunctions and Complex Sentences

Join clauses with coordinating and subordinating conjunctions.

A clause is a group of words with a verb. Conjunctions join clauses. Coordinating conjunctions (and, but, or, so) join two equal clauses to make a compound sentence: “It rained, so we stayed in.”

Subordinating conjunctions (because, although, when, if, until, while) start a clause that depends on the main clause. Together they make a complex sentence: “Although it was sunny, we took umbrellas.”

If the subordinate clause comes first, put a comma after it.

Worked example

Join the clauses with a subordinating conjunction: “We waited. The bus came.”

  1. We waited up to the time the bus came.
  2. Until shows up to what time.

Answer:We waited until the bus came.

Key words

clause
a group of words with a verb
compound sentence
two main clauses joined by and, but, or, so
complex sentence
a main clause plus a subordinate clause
Practise this

New questions every time.

Common Core-referenced: L.3.1h, L.3.1i