日語 Japanese Ask Questions Thread2 質問

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Japanese - Ask questions thread
http://dis.4chan.org/read/lang/1174719097/l50

halp!
pretty fluent in my Japanese reading, writing and speaking, but when people talk i cant understand 3/4 of what is being said. Its like they don't use some particles or something
eg 飯を食べことが好きです　becomes 飯食べこと好きです

am i deaf or is this normal?