Positive statements
| Singular | Plural |
| 1st person | I have eaten .. | we have eaten .. |
| 2nd person | you have eaten .. | you have eaten .. |
| 3rd person | he/she/it has eaten .. | they have eaten .. |
Negative statements
| Singular | Plural |
| 1st person | I haven't eaten .. | we haven't eaten .. |
| 2nd person | you haven't eaten .. | you haven't eaten .. |
| 3rd person | he/she/it hasn't eaten .. | they haven't eaten .. |
Questions
| Singular | Plural |
| 1st person | have I eaten .. ? | have we eaten .. ? |
| 2nd person | have you eaten .. ? | have you eaten .. ? |
| 3rd person | has he/she/it eaten .. ? | have they eaten .. ? |
Note that the third form of the verb is used in all forms of the present perfect.
Back to the explanation of the uses of the present perfect.