Originally posted by Bardock42
Ah okay, I see what you are talking about. If you talk about comprehension you are probably right, however many native English speakers do use them correctly naturally, indeed without ever noticing.
oh ya, as far as letter pronounciation goes, it is nearly different on a word by word (or at least varies depending on the letter it follows) basis. It is a serious area of current research actually, how it is the brain knows that the "s" sound after an "s" follows an "a" versus an "r", because if you look at the waveform analysis, the sounds are remarkably different.
So, words do have their local "pronounciations", which is where accents come from. The difference is that there is no change in the information the letter conveys.
Originally posted by Bardock42
Though do you think it would be hard for an English speaker to use and comprehend the difference between them, cause they can at least hear them, unlike German where the "th" sound has been completely eradicated?
Arabic is very difficult to transcribe, at least for me, because they have long and short versions of vowels that completely change the meaning of words. So ya, because the ability to parse these sounds peaks in very early childhood, it is very difficult for adults to learn it.
For instance, I could live the rest of my life in an Arabic-only environment and would likely never develop the ability of a natural speaker.
In terms of losing sounds, it might make it harder. Depending on how malliable "v" or "f" sounds are in german words, natural english speakers might mistake them for "th".
Originally posted by Bardock42
Are they even the same letter in Arabic as "thorn" and "eth"?
actually, "thorn" and "eth" use the same "th" sound too.
"thorn" and "eth" use the same mouth/lips position as the letter "f", but the tounge curls up. Words like "this", "that" or "them" have the same mouthing and reverberation as the "v" sound, only again, the tongue is up.
For the "thorn" sound, this is the letter: http://en.wikipedia.org/wiki/%E1%B9%AE%C4%81%CA%BE
For the "this" sound:
http://en.wikipedia.org/wiki/%E1%B8%8E%C4%81l