How do you change the -ar verb ending in gerund?

How do you change the -er/ir verb ending in gerund?

Which verb do you use for Present continuous?

Choose the correct option:

Ella...

Choose the correct option:

Yo...

Create the phrase in Present Continuous:

Yo estoy (escuchar)

Create the phrase in Present Continuous:

Ellos están (comer)

Create the phrase in Present Continuous:

Nosotros estamos (trabajar)

Create the phrase in Present Continuous:

Tú estás (estudiar)

Create the phrase in Present Continuous:

Ellos están (saludar)