The present perfect tense is common in English. It is used for many different functions. This page will explain the rules for forming the tense with regular and irregular verbs.
Forming the present perfect tense
This tense is formed using two components: the verb HAVE (in the present tense), and the past participle form of a verb. With a regular verb the past participle ends with -ED (just like the simple past). Irregular verbs have a special past participle form that you have to learn. Here are the rules, using the regular verb "arrive" and the irregular verb "eat":
| Subject
|
HAVE
|
Past Participle
|
| I
|
have
|
arrived
eaten
|
| You
|
have
|
arrived
eaten
|
| He
|
has
|
arrived
eaten
|
| She
|
has
|
arrived
eaten
|
| It
|
has
|
arrived
eaten
|
| We
|
have
|
arrived
eaten
|
| They
|
have
|
arrived
eaten
|
Note that the subject and auxiliary verb may be contracted: "I have" becomes "I've", "She has" becomes "She's", and so
on.
How to make the past participle form
With regular verbs, the past participle is the same as the simple past. You can form it by adding -ED to the end of the verb. (See Forming the Simple Past (Regular Verbs) for more information on this.) However, with some verbs, you need to add -EN or change the verb itself. There are no real rules for this; you just need to learn the verbs which are irregular. Sometimes the past participle is the same as the simple past, and sometimes it isn't. Here are four main categories of verbs with examples. Please note that there are many different ways to form past participles; this is just a small sample:
| Category
|
Present
|
Simple Past
|
Past Participle
|
| Verbs which don't change
|
cut
hit
fit
|
cut
hit
fit
|
cut
hit
fit
|
| Verbs which change their vowel
|
put
sit
drink
|
put
sat
drank
|
put
sat
drunk
|
| Verbs which add -EN
|
break
eat
take
|
broke
ate
took
|
broken
eaten
taken
|
| Verbs which change completely
|
catch
bring
teach
|
caught
brought
taught
|
caught
brought
taught
|
|
