Complex sentence structure in Japanese?

Question:

I've been studying Japanese for a bit, and have learned the basic sentence structure, along with using と as a conjunction. However, I'm having a bit of difficulty using sentences that, in English, have two verbs.

For example: I didn't know you knew Japanese... or: I didn't buy food because I don't have my wallet

Can anyone explain how to create these complex sentences?
ありがとうございます

Answer:

I didn't know you knew Japanese.　
あなたが　にほんごを　ごぞんじ（はなせる）とは　しりませんでした。
I didn't buy food because I DIDN'T have my wallet.
さいふをもっていなかったので、たべものが　かえませんでした。

If you are pointing at と（は） used above, that's 助詞 joshi which indicates word or phrase being defined.

I doubt if と in the first sentence is categorized in ”conujunction”.