Here’s a transcript of the video:
Adverb: desde então
Conjunction: já que, como.
I have studied English since 2002. (prep)
John left home in 2008 and hasn´t been seen since. (adv)
Since you are busy, I will make dinner. (conj) pode ser trocado por Because
DESDE QUE (expressando condição fica – as long as / provided (that)
You can buy this house as long as you sell yours first. ( desde que, sob a condição x)
I will visit you tomorrow provided it doesn´t rain.
Exercises: (qual o significado de since nessas frases?)
My fiancée and I got in a big fight. I haven´t called her since.
She´s been married since June.
I decided to take a nap, since I had nothing else to do.
Como você traduziria esta frase para o inglês?
Ela casará com você, desde que compre um anel bem bonito. (She will marry you as long as / provided that you buy her a very nice ring.)