In spoken English, we often add extra sounds between words to link our words together.
As a result, when you listen to a continuous stream of sound in English, it can be very difficult to identify the individual words.
These extra linking sounds are:
/r/ e.g. Four /r/ onions
/j/ e.g. three /j/ oranges
/w/ e.g. two /w/ apples
Listen to some examples: