冀教版九年級英語上冊《Planet Danny》Look into Science! PPT精品課件，共21頁。
Lead-in
1. Do you know any of the planets in the solar system?
2. What would you like to look at with a telescope?
Read and answer the questions.
1. Why does Danny only see a tiny circle of light?
Because he uses the wrong end.
2. When will they look at stars through the telescope again?
At around 7:00 p.m.
3. What size telescope will Danny use to find a new planet?
Double the size of Danny’s house.
Language points
1.I don’t think you can find one unless you have a bigger telescope.
我認為你不會找到的，除非你有一架更大的望遠鏡。
unless為連詞，意為“除非，如果不”，相當于if…not… ，引導(dǎo)條件狀語從句。
當主句是一般將來時態(tài)、祈使句或謂語中含有情態(tài)動詞或主句是一般現(xiàn)在時，從句中要用一般現(xiàn)在時代替一般將來時。
I will be very angry unless you go with me.
=I will be very angry if you don’t go with me.
如果你不和我去, 我會很生氣。
You will miss the bus unless you hurry up.
除非你快一點，否則你會誤車。
Don’t ask me to explain unless you really don’t understand.
不要叫我解釋, 除非你真的不懂。
2. Well, it’s worth a try, even if I don’t find a planet.
嗯，那仍值得一試，即使我沒有發(fā)現(xiàn)一顆行星。
（1） worth 形容詞，意為“值得”，
be worth doing sth. 值得做某事。
The clock is worth ten dollars.這個鐘表價值10美元。
Is it worth running such a risk? 這樣冒險值得嗎？
（2）even if 意為“即使；縱然” （= even though），引導(dǎo)讓步狀語從句。
He will come on time even if it rains.
即使下雨他也會按時來。
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關(guān)鍵詞：Planet Danny PPT課件免費下載，.PPTX格式；
