Past Participle

Section 11.3.7.3

Past Participle

To form the past participle of a verb, add the ending -ed to the base form. (But note that many common verbs have irregular past participle forms.) The past participle is used in the following circumstances:

After the auxiliary have in the perfect tense

Has the gas chromatograph been fixed
yet?

After a form of the auxiliary be in the passive voice

The gas chromatograph was fixed on Monday.

After the verbs have and get with a causative meaning

We had the gas chromatograph fixed
last week.

As a passive participial adjective

The recently fixed gas chromatograph is
broken again.

## Past Participle ##