I’ve seen it where in a sentence often with two verbs together the second will be accompanied with either a “de” or “a”, and sometimes with nothing. This has driven me insane how does it work like this?
Olá, @TiaK! it’s normal to use prepositions to connect different verbs in a sentence. The exact same thing happens in English, when we say things like “I have to talk” or “We need to meet”. On the other hand, when you have compound tenses, the auxiliary and main verbs will probably go together, e.g. “They had thought”, “She has done”. Was this what you were thinking about? If you’d like, you can share any specific examples