Consumers often purchase complementary goods together, such as peanut butter and jelly.

Consumers often purchase hot dogs and buns together because they are complementary goods.

Complementises are important in sentence structure.

The complementising of the verb adds depth to the sentence.

Complementisation is an important concept in linguistics.

The complementised clause provides additional information.

I wonder if he will come to the party.

The complementor of the verb 'to be' is usually an adjective.

The complementors play a crucial role in the success of the project.

Complementoids are an important part of linguistic analysis.