45 Grk “he”; the referent (Paul) has been specified in the translation for clarity.
46 Grk “going back upstairs.” The participle ἀναβάς (anabas) has been translated as a finite verb due to requirements of contemporary English style.
47 Grk “talking with them.” The participle ὁμιλήσας (homilēsas) has been translated as a finite verb due to requirements of contemporary English style.

In other versions

And when Paul had gone up and had broken bread and eaten, he conversed with them a long while, until daybreak, and so departed.

Then he went upstairs again and broke bread and ate. After talking until daylight, he left.

After going upstairs, breaking the bread, and eating, Paul talked a long time until dawn. Then he left.

Then they all went back upstairs, shared in the Lord’s Supper, and ate together. Paul continued talking to them until dawn, and then he left.

So he went up and broke bread, and when he had eaten and talked for a long time, until dawn, then he departed.

When he therefore was come up again, and had broken bread, and eaten, and talked a long while, even till break of day, so he departed.

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