Many times in fast speech, i've heard people say the prep "to" like only with a sound /ə/ (maybe with a little flap t as in 'better'). For example: i'm trying to help. I'm not trying to get mad at....Or, Power to sing. In the sentence, i'm trying to help, it sounds like /am trai ə help/. Is that really what they do? I ask this because i feel like it's smoother and easier for me to pronounce "to" with only a schwa sound when speak fast. I just wanna make sure it's proper.
PS: for instance, in this utube video https://youtu.be/tVja6oEUYlo, min 1:16. 'He helps people and corporations learn how to make better decisions'. That "to" is pronounced /ə/ or /də/ ?. it's fast, so i can't be sure,but I think it's /ə/