450)=450">

181. What are you doing?
你正在干什么？

182. I'm reading a book.
我正在看書。

183. What's your friend doing?
你朋友正在干什么？

184. He's studying his lesson.
他正在上課。

185. I'm not doing anything right now.
我現(xiàn)在什么都沒干。

186. Where are you going?
你要去哪兒？

187. I'm going home.
我正要回家。

188. What time are you coming back?
你什么時候回來？

189. I'm not sure what time I'm coming back.
我不確定我什么時候能回來。

190. What are you thinking about?
你在想什么？

191. I'm thinking about my lesson.
我在想我的功課。

192. Who are you writing to?
你正在寫誰？

193. I'm writing to a friend of mine in South American.
我正在寫我一個南美的朋友。

194. By the way, who are you waiting for?
順便問一下，你在等誰？

195. I'm not waiting for anybody.
我沒有在等任何人。