外研版八年級英語下冊《Language in use》journey to space PPT下載，共16頁。
New words
earth n. 地球
moon n.月球，月亮
astronaut n.宇航員
space travel 航天旅行
model n. 模型
spaceship n. 航天器，宇宙飛船
universe n. 宇宙
galaxy n. 星系
solar system n. 太陽系
environment n. 環(huán)境
Grammar
have been to與have gone to和have been in的區(qū)別 ：
（1）have/has been to意為“曾經(jīng)去過某地”，表示現(xiàn)在已經(jīng)不在那里了,后可接表示頻率的名詞，如：once、twice、three times等等，例如：
I’ve just been to the post office.
Have you ever been to Hangzhou?
Mary has never been to the Great Wall.
I’ve been to Beijing three times.
They have been to that village several times.
（2）have /has gone to 意為“到某地去了”，表示到了某地或正在去某地的途中�？傊�，說話時(shí)該人不在現(xiàn)場。
—Where is Tom?
——湯姆在哪里？
—He has gone to the bookshop.
——他到書店去了。
（3）have /has been in 意為“在某地待了多長時(shí)間”，常與時(shí)間段連用。
I have been in this school for three years.
He has been in Beijing for half a month.
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關(guān)鍵詞：Language in use PPT課件免費(fèi)下載，journey to space PPT下載，.PPTX格式；
