When you want to emphasize that an action is happening right now, you use the present progressive tense.
To form the present progressive tense, use the present -tense forms of ESTAR + the present participle.
for -AR verbs: stem + -ando. Lavar= lavando
for -ER and-IR verbs: stem + -iendo.
Comer= comiendo
Escribir= escribiendo
Ella ______(estar) ________(pasar) la aspiradora.