Personal (subject) pronouns are words such as 'I', 'you' and''we' and are the subject of a verb.
They are as follows:-
| I | ek |
| you | jy |
| you (formal) | u |
| he | hy |
| she | sy |
| we | ons |
| you (plural) | julle, u |
| you (plural formal) | u |
| they | hulle |
And here are some example sentences:
| I am sorry | Ek is jammer |
| I can't speak Afrikaans | Ek kan nie Afrikaans praat nie |
| Do you speak Afrikaans? | Praat jy Afrikaans? |
| She has a dog | Sy het 'n hond |
| We have a dog | Ons het 'n hond |
In Afrikaans as in English some of the pronouns have more than one meaning.
For example, ons can mean 'we' or 'us' depending on how it is being used.
Afrikaans has both singular and plural forms of 'you' as well as formal and informal.
Jy is used in the singular (i.e. when addressing one person only) and is informal.
Julle is used when speaking to more than one person (informally) and u is the formal version of you and is used both in the singular and plural.
The wiki entry has a thorough (and complicated) explanation of grammatical terms.