Contact clauses – no relative pronouns

When can relative pronouns be left out?

We leave out the relative pronoun (who/which/that) if it is not the subject in the sentence.

► If there is a verb after the relative pronoun who/which/that, do not leave out the relative pronoun.

Examples with the relative pronoun who

1st part of the sentence2nd part of the sentence
This isthe girlwhowasat the party last night.
SubjectVerbRestSubjectVerbRest

who is the subject in the sentence, do not leave it out.

1st part of the sentencePronoun2nd part of the sentence
Thisisthe girlwhoIwillmarry.
Thisisthe girlcan be left outIwillmarry.
SubjectVerbRestSubjectVerbRest

who is not the subject in the sentence, so it can be left out.

Examples with the relative pronoun which/that

1st part of the sentence2nd part of the sentence
Thisisthe housewhichwassold.
SubjectVerbRestSubjectVerbRest

which is the subject in the sentence, do not leave it out.

1st part of the sentencePronoun2nd part of the sentence
Thisisthe housewhichIboughtlast week.
Thisisthe housecan be left outIboughtlast week.
SubjectVerbRestSubjectVerbRest

which is not the subject in the sentence, it can be left out.