Las chicas HABLARON.
This is the PRETERITE or PAST TENSE of HABLAR.
The preterite conjugations of hablar and other AR verbs are:
- é
- aste
- ó
- amos
- aron
For ER or IR verbs they are:
- í
- iste
- ió
- imos
- ieron
Las chicas hablan
This means that the girls are talking in present tense
