Jim talks to Fran on Finn's phone while Finn and Gina watch him.
Jim talks to Fran on Finn's phone while Finn and Gina are watching him.
Jim is talking to Fran on Finn's phone while Finn and Gina watch him.
Jim is talking to Fran on Finn's phone while Finn and Gina are watching him.
Can I freely combine the present perfect simple tense with the present perfect progressive tense or is it bad grammar?
Which one of the sentences would be the normal choice?