I minimize the Duolingo web site to half my Browser screen, then open Google translate on the other half. That way I can hear an alternate speaker (I have a hard time understanding the woman on this web site and have to have a lot of words repeated, plus I have cheap headphones). But, by also having Google translate open, I can type in what I think I'm supposed to translate on Duolingo without being penalized (corrections down below shown in RED) so the lesson goes faster.
In English, there is no adverb "fastly". "Fast" can be an adjective or an adverb, while "quick" is an adjective and "quickly" is an adverb.
- That is a fast car; I need to have a quick chat with you - adjective
- I walk fast to work every day; Do you eat quickly or slowly? - adverb