. . be seen clearly in contracted forms like isn't (is not), I'll (I shall/will), who's (who is/has), they'd (they had, they should, or they would), haven't (have not) and so on. We see from these examples that vowels or/and consonants can be elided. In the case of contractions or words like library (pronounced in rapid speech as /laibri/), the whole syllable is elided." (Tej R Kansakar, A Course in English Phonetics. Orient Blackswan, 1998)
