A y in pinyin usually sounds similar to the y in yes (for example, 也, yě). When you see a w, it will normally be pronounced like the w in wood (for example, 我, wǒ).
Two exceptions are the syllables yi and wu (as in 一 and 五) where the y and w are rarely pronounced.
You already know how to ask questions by saying 不 (bù, not) after the verb and then repeating the verb again; for example, 那是不是你的妻子？ This works with adjectives, too!
Also, notice that in this pattern, 很 (hěn) is no longer used.
你高兴不高兴？
Nǐ gāoxìng bu gāoxìng?
Are you happy?
他忙不忙？
Tā máng bu máng?
Is he busy?
Remember that 很 (hěn) is usually used before adjectives, even when it doesn’t actually mean very (for example, 我很高兴。 However, in questions ending with 吗 (ma), speakers are less likely to use 很.
她们忙吗？
Tāmen máng ma?
Are they busy?
In fact, if a speaker does add 很 to a question with 吗, it’s likely that 很 means very.
她们很忙吗？
Tāmen hěn máng ma?
Are they very busy?