Kaida
Coming back to your original question, E.g. "be, he, we" - surely they are just another sound for "e" with the normal "b", "h" and "w" put on the front?
Yes. At sound level, English is 80% regular, because even the 4,000 tricky words have mostly just one or two tricky letters, but they are enough to make children stumble over the words which contain them - in reading and even more in spelling.
Most consonants (b, c, d....) are used quite regularly. Even -tion does not have many exceptions, but the /ee/ sound is spelt very messily. It's the second biggest English spelling problem, after consonant doubling (very merry, copy poppy, shoddy body...).
For spelling, children have to learn all the 456 words with it one by one.
In endings alone we have these spellings:
be/bee, he, me, she, we, pea/pee, plea, sea/see, tea/tee, key/quay, ski, fee, flee, free, knee, lee, three, tree.
The worst part of the unpredictable spellings for /ee/ (speak, speech, believe, even) is that, apart from ee, they are all used for other sounds as well:
treat, great, field, friend, here, there.
It goes without saying that if the /ee/ sound was always spelt ee, learning and teaching to read and write words with it would be vastly easier than it is.
Masha Bell