Assuming you mean by adding an accent to a letter - I have answered a similar question - click the related link.
The O could be a long vowel, but as OR is a special vowel sound because of its different pronunciation in US English (or) and British English (aw). Neither of the A's has a long sound.
The vowel "u" in Küche has a long vowel sound, pronounced like "oo" in English.
Is panel a short or long vowel sound
A long vowel is a vowel sound that is pronounced for an extended period of time. In English, a vowel is often considered long if it is followed by a silent "e," as in the word "note."
The vowel sound is an "or" which is a long O in US English and a caret O (aw) in British English.
The terms "long" and "short" do not properly describe English vowels. The vowel in song is the same as the vowel in lawn - neither long nor short.
Only has a long vowel! It is one of those English words that can be hard to tell. If only had a short vowel it would sound like this "on-ly"
Negotiate has three "long" vowel sounds, one of which helps demonstrate how inadequate the terms "long" and "short" are when applied to English vowels. The "long" o and the "long" a are obvious. Less so is the "long" e vowel ( spelled with an i ).
"Bake" has a long vowel sound, as the 'a' is pronounced like the 'ay' diphthong in English.
That all depends on which vowel you're talking about. The O is long, but the E is short.
No, the vowel sound in "goat" is short, usually pronounced as /oʊ/ in American English.
The AW is related to the long OR/AW sound in British English. The EY vowel pair has a long E sound as in barley and galley.