Sorry, just re-read my post and I see where it doesn't make sense. I don't think it explained verbs in the present tense at all, they just were there in the example sentences.

On the other hand I started the lesson on the past perfect tense, it explains that sentences using the perfect tense are more versatile than say the perfect tense in English, which can only be used in certain contexts. It gave an example sentence showing how the sentence using the perfect tense works, "ich habe Anna letzte Woche gesehen" (I have seen Anna last week), it says it's grammatically correct in German but doesn't quite work the same in English. It also describes verbs pretty well from what I read and skimmed through (I didn't finish the lesson because it's pretty long and I did not sleep last night and can't focus much today). It also explained in sentences where there is more than one verb, the second verb gets pushed to the end of the sentence (I'm probably not explaining this well, I'm sorry in advance). So that was explained pretty well, I just have to finish the lesson after I get some sleep. I don't know if any of what I just wrote makes sense or not, let me know is it doesn't.