The weak form of to is /tə/ and attend starts with /ə/.
According to the rule of linking vowel to vowel, we have to add "w" glide consonant to link two words preceding one ending with a back vowel and following one starting with any vowel.
So, do natives pronounce "to attend" as /tə wəˈtɛnd/? I feel weird when i have to follow these rules on linking vowel to vowel.