« ce / c' » 和 一点 "法语的读音" "这 ; 那" 是...
"that ; this" is...
<em>"cela / ce ; ceci / ce" est...
</em>
When there's a vowel after <em>"ce"</em>, <em>"ce"</em> must be <em>« c' »</em>
So <em>"~ce est~"</em> must be <em>"c'est"</em>. (As you can say "that is" or "that's" but can't say "~this's~")
No big difference between <em>"cela"</em> and <em>"ce"</em> or between <em>"ceci"</em> and <em>"ce"</em>.
<em>"ce"</em> is simply more used.

« { ... } » = { pinyin }
« { ~...~ } » = { ~not exactly pinyin or not pinyin at all~ }
« (...) » = (to NOT pronounce)

« - » = no liaison between the syllables.
Example ==> <em>Gautier</em> = { go(u) - ti ye }
{ ti ye } isn't { ti - ye } prononciate quickly, but near of { tia(n) } (infact, prononciate very very, very quickly)... ^^'

The <em>"e"</em> in { ye } is, in French <em>« é »</em>.
Its "opposition" is <em>« è »</em>, near of { ei } but with no "i" at the end. So, 上下： { e(i) }

At last, there's two <em>« o »</em> in French.
{ o } 像：哦，我，博，错，末，说，找...
and
{ o(u) } 像：欧，都，够，后，就，口，六...
... there's also two <em>« e »</em>... but it's very complicate to write... there's the same as in "饿，了，呢..." and a sort of <em>« eu »</em>... ... ... ^^'
For the "e" as "饿", the mouth is like the "o" in "哦", open ; for the other "e", the mouth is like the "o" in "欧", closed.
In France, we just call these different vowels : <em>"o ouvert"</em> and <em>"o fermé"</em> ("o open" and "o closed") and <em>"e ouvert"</em> and <em>"e fermé"</em>.

to be = <em>être</em> { ~è~ ~tr(e)~ }
I am = <em>je suis</em> { re - ~sv~ yi }
you are = <em>tu es / t'es</em> { tv - ~è~ / ~tè~ }
he is ; she is = <em>il est ; elle est</em> { yi - ~lè~ ; ~è~ - ~lè~ }
that is = <em>cela est / c'est</em> { se - la - ~è~ / ~sè~ }
this is = <em>ceci est / c'est</em> { se - ~sy~ - ~è~ / ~sè~ }
we are = <em>nous sommes</em> { nu - ~so~ m(e) }
you are = <em>vous êtes</em> { ~vu~ - ~z~ ~èt(e)~ } (<em>vous</em> = "plural" or 用的像 "您")
they are = <em>ils sont ; elles sont</em> { yi ~l(e)~ - son(g) ; ~è~ ~l(e)~ - son(g) }
those are ; these are = <em>ce sont</em> { se - son(g) }

The rule with <em>« ce = c' »</em> exist for "the" = <em>"le / la" = « l' »</em>
<em>le</em> = 阳性 / <em>la</em> = 阴性
<em>le ciel</em> { le - ~sy~ ~è~ ~l(e)~ } (天)
<em>la lune</em> { la - lv n(e)} (月)
<em>le soleil</em> { le ~so(u)~ - lei } (日)
阳性：<em>l'océan</em> { lo(u) - ~sé~ - an(g) } (海洋)
阴性：<em>l'aube</em> { lo(u) ~b(e)~ } (凌晨)