monkey
No, the words then and there do not have long e sounds. Then has a short e, and there, rhymes with air, has a short a.
The words that have the "y" sound like long e are fry, sky, and tiny.
A long e sounds like the way you pronoune the letter e. Words like sheep, queen, tree, bee, eel. A short e sounds more like eh. Words like egg, Edison, explanation, vest, nest. In the dictionary there will be a straight line or dash above a long e (this is a long a -- ā). There will be a flattened U shaped symbol above short e (this is a short a -- ă).
One example of a word that ends in 'e' but is pronounced like 'a' is "chocolate." This is because the 'e' at the end is silent, and the 'a' is emphasized.
The EA sounds like EE in many words, including easy and please.
There are I words with a silent E, such as bite, dime, and while. There are I words spelled with GH such as high, sigh, light, and right. There are I words that begin with the prefix bi- which virtually always sounds like BY, or tri- which sounds like TRY. Examples are binary, bimonthly, and trimester.
In American English the name Charlene would sound like Sh-ar-lee-en. The Ch at the beginning sounds like the sh in words like share and sharp. The ar then sounds like the word are and the le sounds like the word lee. Finally the n sounds like en with just the n sound. The final e is silent and not heard at all, but it gives you the clue that the previous e is the long e sound.
When words starts with a,e,i,o,u then we put an in front of these words. and those words which are sounds like wovels for example hour we pronounced it as our.
The EA pair sounds like a long E (ee) and the other E is a short E.
The only likely candidate is been, which sounds like bin (short I vowel sound).There are prefixed words such as reenter and preeminent which have both a long E and short E (or rarely I). In some pronunciations, some of these may lose the long E (e.g. preelection).There are also French words, such as sautéed and fiancée, which have a long A sound instead.
In "silent E" words such as bite, mite, site, white, the E ending changes the sound of the short I to a long I. There are no English words where a final single E sounds like a long I. However, there are IE words such as die, pie, lie, and vie, and YE endings such as bye and dye.