I applied green card with TN. The answer is from my lawyer may help
1）我的理解是如果Perm或140沒批，我還可以繼續renewTN, 不會被拒。如果140批了，file了485以後，就不能renewTN了。請問我的理解對不對？
your understand is 100% correct. you can renew TN with Perm approved, but not I140. Once you file I140, you have risk to get TN denied because the I140 shows your immigration intention.
2）我聽說從140批了到可以file485要四到五年呢，那這期間如果不能renewTN用什麽工作呢？不是file485以後才能申請EAD嗎，用EAD工作嗎？
You understand correct. you cannot summit I485 and EAD unless you are EB1. obvoius you are employ based EB2.
3）我在來現在這個公司前（5年前）為了保持身份，用朋友的公司申請過三個月TN。 他的公司是正規合法的，但沒給我發工資。從我護照上看不出問題，但如果申請綠卡，會不會有問題？我怎樣才能繞過這段呢？
I bielieve they have record, so you cannot avoid. You have to explain this is leagle. If you were in canada that time, you can say you didn't work for them. If you were in US and more than 3 month, I don't know how you can explain. Maybe just cross your finger.
