Learn Dutch: Waarom ben je de stoel aan het schilderen?

In Dutch, when you use the zijn aan het + infinitive construction, the conjugated verb (ben) goes in the normal verb spot, but aan het and the infinitive (schilderen) get pushed to the end of the sentence. The object, de stoel (the chair), is placed right between them.

Why is it ben je and not bent je? Doesn't je usually take a -t ending?

Yes, the regular statement form is je bent (you are). However, when the verb comes before je or jij to form a question, the verb drops the -t. So it becomes ben je.

Can I just say Waarom schilder je de stoel without using aan het?

Yes, you can! The Dutch simple present tense (schilder je) can mean either 'do you paint' or 'are you painting'. However, using ben ... aan het schilderen is the best way to emphasize that you are actively in the middle of doing it right now.

Could I use jij instead of je in this sentence?

Absolutely. Je and jij both mean 'you' (singular, informal). Je is the normal, unstressed version. You would use jij (Waarom ben jij de stoel aan het schilderen?) if you wanted to emphasize who is doing the painting, as in 'Why are YOU painting the chair (and not someone else)?'