Questions & Answers about Ŝi etendas la spinon kaj kontrolas sian sintenon.
Because -as is the Esperanto ending for the present tense.
- etendas = stretches / is stretching
- kontrolas = checks / is checking
Unlike English, Esperanto verbs do not change for person:
- mi etendas = I stretch
- ŝi etendas = she stretches
- ili etendas = they stretch
The verb ending stays the same; only the subject changes.
Because the same subject, ŝi, applies to both verbs.
So this structure means:
- Ŝi etendas ... kaj kontrolas ...
- literally: She stretches ... and checks ...
Esperanto often omits repeating the subject when it is still clearly the same one.