動詞 wonder:

1. have a wish or desire to know something
   同義詞：wonder, inquire, enquire
2. place in doubt or express doubtful speculation
   同義詞：wonder, question
3. be amazed at
   同義詞：wonder, marvel

形容詞 wondering:

1. showing curiosity
   同義詞：inquisitive, speculative, questioning

1. I am wondering if the letter is over-weight.
   我不知道這信是否超重了。
2. I was just wondering about that myself.
   我就是覺得這件事莫名其妙。
3. I cannot help wondering about that girl.
   我不免對那個女孩感到驚奇。
4. I was wondering if you were doing anything this weekend.
   我想知道這個周末你有什么要做。

won.der.ing

adj.（形容詞）
Feeling or expressing awe, admiration, amazement, or surprise.
驚奇的，詫異的：感覺或表達敬畏、欽佩、吃驚或驚奇的

【引伸】
won.deringly
adv.（副詞）