# They were all filled with the Holy Spirit and

This can be stated in active form. Alternate translation: "The Holy Spirit filled all of those who were there and they" (See: [[rc://en/ta/man/jit/figs-activepassive]])

# speak in other tongues

They were speaking in languages that they did not already know.

# as the Spirit gave them the ability

The Holy Spirit gave them the ability to speak; they were dependent on the Spirit to speak in different languages.