"I?am?very?happy."更恰当。very：adv.很，非常；充分，完全（在此处）
具体解释：
?very1.?ADV?
副词很，非常（用于修饰形容词或副词，表示强调）?Very?is?used?to?give?emphasis?to?an?adjective?or?adverb.? 搭配模式：ADV?adj/adv语用信息：emphasis
The?problem?and?the?answer?are?very?simple...?
问题和答案都非常简单。
It?is?very,?very?strong?evidence?indeed...?
这的确是非常非常有力的证据。
I'm?very?sorry...?
我很抱歉。
They?are?getting?the?hang?of?it?very?quickly...?
他们很快就会找到窍门。
Thank?you?very?much...?
十分感谢你。
The?men?were?very?much?like?my?father.?
那些人很像我的父亲。
2.?PHRASE?短语绝不；远非；不太；稍微?Not?very?is?used?with?an?adjective?or?adverb?to?say?that?something?is?not?at?all?true,?or?that?it?is?true?only?to?a?small?degree.? 搭配模式：usu?PHR?adj/adv
She's?not?very?impressed?with?them...?
她对他们没什么印象。
I'm?not?very?good?at?explaining?myself...?
我不太善于为自己辩解。
It's?obviously?not?used?very?much...?
很明显这个没怎么用过。
'How?well?do?you?know?her?'?—?'Not?very.'?
“你有多了解她？”——“不太了解。”
3.?ADV?副词显然;确实;真正地?You?use?very?to?give?emphasis?to?an?adjective?that?is?not?usually?graded,?when?you?want?to?say?that?a?quality?is?very?obvious.? 搭配模式：ADV?adj语用信息：emphasis
Janet?looked?very?pregnant...?
珍妮特看上去显然是怀孕了。
His?taste?strikes?the?English?as?very?French...?
他的品位让英国人觉得他是个地道的法国人。
If?you?think?I'm?happy?with?what's?left,?you're?very?wrong.?
如果你认为我对剩下的很满意，那你就大错特错了。
4.?ADV?副词完全，最（用于修饰形容词或副词最高级,表示强调）?You?use?very?to?give?emphasis?to?a?superlative?adjective?or?adverb.?For?example,?if?you?say?that?something?is?the?very?best,?you?are?emphasizing?that?it?is?the?best.? 搭配模式：ADV?superl语用信息：emphasis
They?will?be?helped?by?the?very?latest?in?navigation?aids...?
他们将会受益于最新的导航系统。
I?am?feeling?in?the?very?best?of?spirits...?
我感觉自己的精神状态绝佳。
At?the?very?least,?the?Government?must?offer?some?protection?to?mothers?who?fear?domestic?violence.?
最起码，政府必须向害怕遭受家庭暴力的母亲们提供某些保护。
5.?ADJ?形容词（与某些名词连用，以确指最远的某一位置或时点）极端的?You?use?very?with?certain?nouns?in?order?to?specify?an?extreme?position?or?extreme?point?in?time.? 搭配模式：ADJ?n语用信息：emphasis
At?the?very?back?of?the?yard,?several?feet?from?Lenny,?was?a?wooden?shack...?
在院子的最后面离伦尼几英尺远的地方有一个小木屋。
I?turned?to?the?very?end?of?the?book,?to?read?the?final?words...?
我翻到书的最后一页去读最后的文字。
The?opening?of?a?Euro-Disneyland?in?the?very?heart?of?France?is?a?potent?symbol...?
欧洲迪斯尼乐园在法国首都的开业就是一个有力的标志。
He?was?wrong?from?the?very?beginning...?
他从一开始就错了。
We?still?do?not?have?enough?women?at?the?very?top.?
处于最高层的女性仍然不够多。
6.?ADJ?形容词正是的;合适的;同样的?You?use?very?with?nouns?to?emphasize?that?something?is?exactly?the?right?one?or?exactly?the?same?one.? 搭配模式：ADJ?n语用信息：emphasis
Everybody?says?he?is?the?very?man?for?the?case...?
每个人都说他是接手这个案子的最佳人选。
She?died?in?this?very?house...?
她正是在这间屋子里死去的。
In?my?view,?it?only?perpetuates?the?very?problem?that?it?sets?out?to?cure...?
在我看来，这只会使要着手解决的问题一再拖延下去。
'Most?secret',?he?called?it.?Those?were?his?very?words.?
他称之为“绝密”。这是他的原话。
7.?ADJ?形容词（与名词连用，强调重要性或严重性）仅仅的，唯独的，甚至于，就连?You?use?very?with?nouns?to?emphasize?the?importance?or?seriousness?of?what?you?are?saying.? 搭配模式：ADJ?n语用信息：emphasis
At?one?stage?his?very?life?was?in?danger...?
他的生命都曾一度处于危险之中。
The?very?basis?of?Indian?politics?has?been?transformed...?
甚至于印度的政治基础都被改变了。
Mr?Campbell?said?such?programmes?were?by?their?very?nature?harmful...?
坎贝尔先生说此类节目本质上就是有害的。
History?is?taking?place?before?your?very?eyes.?
历史就在你的眼前发生。
Usage?Note?:?Very,?so,?and?too?can?all?be?used?to?intensify?the?meaning?of?an?adjective,?an?adverb,?or?a?word?like?much?or?many.?However,?they?are?not?used?in?the?same?way.?Very?is?the?simplest?intensifier.?It?has?no?other?meaning?beyond?that.?So?can?suggest?an?emotional?reaction?on?the?part?of?the?speaker,?such?as?pleasure,?surprise,?or?disappointment.?John?makes?me?so?angry!...?Oh?thank?you?so?much!?So?can?also?refer?forward?to?a?result?clause?introduced?by?that.?The?procession?was?forced?to?move?so?slowly?that?he?arrived?three?hours?late.?Too?suggests?an?excessive?or?undesirable?amount,?often?so?much?that?a?particular?result?does?not?or?cannot?happen.?She?does?wear?too?much?make-up?at?times...?He?was?too?late?to?save?her.?
very，so和too都可用来加强形容词、副词或much，many之类词语的含义，但它们的用法不尽相同。very?是最简单的强调词，除了表示强调没有其他含义。so可以表达说话者的情感反应，如高兴、惊讶或失望：John?makes?me?so?angry（约翰真是气死我了),?Oh?thank?you?so?much（哦，非常感谢）。亦可用so与以that引导的结果从句连用：The?procession?was?forced?to?move?so?slowly?that?he?arrived?three?hours?late（由于行进队伍被迫缓慢前进，结果他迟到了3个小时）。too表示数量过多或不尽如人意，常常导致没有或无法达到某一结果：She?does?wear?too?much?make-up?at?times（她有时确实把妆化得太浓了），He?was?too?late?to?save?her（他来得太迟了，没能救得了她）。
8.?CONVENTION?惯用语好的，是（用于表示对上级的指示或命令遵照执行）?Very?good?is?used?to?tell?someone?in?authority?that?you?agree?to?carry?out?a?suggestion?or?order.? 语用信息：formulae语域标签：FORMAL?正式
'Now?give?me?some?account?of?your?voyage.'?—?'Very?good,?sir.'?
“现在给我讲述一下你的航程吧。”——“非常乐意，先生。”
9.?PHRASE?短语的确如此;千真万确?The?expression?very?much?so?is?an?emphatic?way?of?answering?'yes'?to?something?or?saying?that?it?is?true?or?correct.? 搭配模式：PHR?as?reply语用信息：emphasis
'Are?you?enjoying?your?holiday?'?—?'Very?much?so.'?
“你的假期过得愉快吗？”——“非常愉快。”
10.?CONVENTION?惯用语那好吧，行（用于表示同意或接受，即使不是完全满意）?Very?well?is?used?to?say?that?you?agree?to?do?something?or?you?accept?someone's?answer,?even?though?you?might?not?be?completely?satisfied?with?it.? 语用信息：formulae
'We?need?proof,?sir.'?Another?pause.?Then,?'Very?well.'...?
“我们需要证据，先生。”又是一个短暂停顿。然后，“那好吧。”
Very?well,?please?yourself.?
好的，你自己随意。
11.?PHRASE?短语不好，不能，没法（做…）?If?you?say?that?you?cannot?very?well?do?something,?you?mean?that?it?would?not?be?right?or?possible?to?do?it.? 搭配模式：V?inflects
He?couldn't?very?well?go?to?her?office?and?force?her?to?write?a?check...?
他不能去她的办公室强迫她开支票。
I?said?yes.?I?can't?very?well?say?no.?
我答应了。我没法拒绝。（来自于《柯林斯COBUILD高阶英汉双解学习词典》）