Learn Dutch: Ze kan het pakket vandaag sturen. - She can send the package today.

This is the famous Dutch verb bracket. When you have a modal verb like kan (can), it takes the second spot in the sentence. The main action verb, sturen (to send), gets pushed to the very end of the sentence, wrapping around the other words like a bracket.

Would I use kunt instead of kan here?

No, because the subject is ze (she). The verb kunnen (to be able to) is slightly irregular. You use kan for ik (I), hij (he), ze (she), and het (it). You only use kunt for jij or u (you).

Could I say Ze kan sturen het pakket vandaag like in English?

No, that is incorrect in Dutch. Because of the verb bracket rule, the full infinitive verb (sturen) must wait until the absolute end of the sentence. The object (het pakket) and the time (vandaag) have to go inside the bracket, before the final verb.

Why is it het pakket and not de pakket?