Learn Italian: La figlia di Marco è triste; la sto intrattenendo. - Marco's daughter is sad; I am entertaining her.

In Italian, when you use the progressive tense (stare + a gerund, like intrattenendo), you have two options for pronoun placement. You can put direct object pronouns like la (her) right before the conjugated verb (sto), which is what happens in this sentence: la sto intrattenendo.

Could I attach la to the end of intrattenendo instead?

Yes! With the stare + gerund construction, you can also attach the pronoun directly to the end of the gerund. So, saying sto intrattenendola is perfectly correct and means exactly the same thing.

What is the dictionary form of intrattenendo?

The infinitive verb is intrattenere (to entertain). It is built from the common verb tenere (to hold). To form the gerund (the "-ing" word) for an -ere verb, you drop the -ere and add -endo.

Since she is currently sad, why do we use è triste instead of sta triste?