Past participle

From Conservapedia

A past participle is used to indicate the past or a completed action or time. it is formed by adding "-d" or "-ed", to the base form of regular verbs, but can be formed in other ways for irregular verbs.

For example, in the sentence 'I have swallowed a button', swallowed is a past participle of the regular verb "swallow".

Examples of how the past participle is formed for irregular verbs are as follows:

Base form	Past participle
know	known
eat	eaten
become	become
fly	flown

There are no hard-and-fast rules for the past participle of irregular verbs, unfortunately, which means that their various forms have to be memorised.

The past participle can be used as follows:

• Participial phrases

Based on the results of the examination, Mark changed his plans.

• Participial adjectives

The teacher was determined to finish the chapter.

• Using the perfect tenses

I have stayed there many times before.

• using the passive voice

The shop was closed by the time we arrived.