文頭 ぶんとう
buntō

Noun

1. start of a sentence, phrase, etc.

canは じょ動詞 どうしですので、疑問 ぎもん ぶんでは文頭 ぶんとう ってきます。
kyanwa jodōshidesunodegimombu ndewa buntōni motte kimasu
'can' is an auxiliary verb, so in question sentences it is brought to the start of the phrase.