Japanese · Pronunciation Guide
o-mo-u, three beats — in casual speech the last two often merge into a long "oo," but the count stays at three.
omou
The melody peaks on the middle beat; all three take the same time. The final vowel is the one to watch: whether you articulate a distinct u or let it merge into a long o with the mora before it, the word must still take three counts. English speakers typically deliver two and finish early.
Listen: 思う
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どう思いますか。
Dou omoimasu ka?
What do you think about it?
Listen: どう思いますか。
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
どう思いますか opens with どう, a long o held for two beats, and then 思います gives you o-mo-i-ma-su — five morae where the u of the dictionary form has become an i. Two words in a row starting with o-sounds, both of which need their full length before the question particle arrives.
A two-beat "oh-MOH" is the usual output, with the final vowel dropped entirely because it's unstressed and therefore, by English logic, disposable. It isn't. Either articulate the u separately or hold the o long — but don't stop after two beats. Also freeze both o's: any lip movement during them imports the English diphthong.