1.She is especially zealous in practicing yoga.
她非常热衷于练习瑜伽。
还能这样说：
She is interested in doing yoga.
She is crazy about practising yoga.
谚语：
Deliberate in counsel, promp in action.
考虑要仔细，行动要迅速。
2. Anna, do you know the Yoga?
安娜，你懂瑜伽吗？
还能这样说：
Do you know something about yoga?
Can you tell me what yoga is?
应用解析：
know of 听说过，知道；
know sb. at once 立刻认出某人；
know right from wrong 分辨是非；
know better days 过好日子
3. I've been practising yoga for a long time.
我练瑜伽有一段时间了。
还能这样说：
I began to do yoga for some days.
I've begun to do yoga since a long time ago.
谚语：
Better a little loss than a long sorrow.
宁可做点牺牲，不要长久悲痛。
4. I do one and a half hours yoga every day.
每天我练一个半小时瑜伽。
还能这样说：
I spend one and a half hours on practising yoga.
It takes me one and a half hours to practise yoga every day.
应用解析：
not half as 远远不，几乎不；
more than half 非常；
on the halves 平分；
by half 过分