To speak fast or to understand native speakers is always challenging, native speakers tend to “eat” sounds, tend to link sounds, and tend to blend sounds together, besides contractions and connected speech it makes it difficult for English learners.
Sounds can be totally different than how they are written
Sounds can be totally different from how they are written! This is very common. Check these series of videos and try to keep this post near by… because I’ll make more videos like these that you can enjoy:)