Questions & Answers about O primo viaja com Ana.
Portuguese often omits subject pronouns when the verb already makes the subject clear.
In O primo viaja com Ana, the subject is already stated as O primo, so adding ele would be unnecessary.
Portuguese does this much more often than English. In English, you usually must say the subject; in Portuguese, it is often clear from context or from the verb form.
Viaja is the 3rd person singular present indicative form of viajar (to travel).
Conjugation of viajar in the present:
So viaja matches:
- ele viaja
- ela viaja
- você viaja
- or a singular noun like o primo viaja