（1）他六岁之前不仅仅弹钢琴而且拉小提琴
（2）他的家人带领他参观欧洲，并在很多城市举办音乐会
（3）一些科学家已经把宇宙飞船发射到火星上
（4）宇航员已经在火星上发现生命了吗？
（5）我听说他们已经去上海出差了
（6）他已经去上海出差了还没回来
（7）你已经学汉语多长时间了？
（8）你住在这里多长时间了？
（9）她已经学汉语一年了
（10）自从1989年，希望工程已经在全国建立了多所学校
（11）我和他相处的很好，我们相同的时间
（12）你认识她多长时间了？
（13）他的父母想让他弃学
（14）你生病时谁照顾你？
（15）昨天晚上10点你在做什么？
（16）一天他正拿着一本书坐在河边，但他没读
（17）爱丽丝正坐在河边这时一只兔子从她身边跑过
（1）Before he was six years old is not only playing the piano and violin.
（2）His family led him to visit Europe, and held concerts in many cities.
（3）Some scientists have already launched a spacecraft to Mars.
（4）Astronauts have found life on Mars it?
（5）I heard that they have to go to Shanghai on a business trip.
（6）He has not come back to go to Shanghai on a business trip.
（7）How long have you been learning Chinese?
（8）How long you live here it?
（9）She has been learning Chinese for a year.
（10）Since 1989, the Hope Project has been established throughout the country a number of schools.
（11）He and I get along very well, we have the same time.
（12）How long have you known her?
（13）His parents wanted him to leave school.
（14）Who takes care of you when you are sick?
（15）Yesterday, 22:00 What are you doing?
（16）One day he was holding a book sitting on the river, but he did not read.
（17）Alice is sitting in the river when a rabbit ran from her.
1. He not only played piano but also played violin before he was 6 years old. // He played not only piano but also violin before he was at the age of six.
2. His family took him round Europe, and held (music) concerts in many cities.
3.Some scientists have sent spaceships up onto the Mars.
4.Have astronauts found life on the Mars?
5.I hear they have gone to Shanghai on business.