新概念青少版2Bunit21ppt课件

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Picture 2
Weather forecaster:
Thanks John, and good morning! Last month was unusually cold and dry. But all that will change in the next few days.
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Picture 3
Weather forecaster:
From today, the wind will blow from the south west. It will bring in warm air from the Atlantic. And we'll have some rain.
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Picture 4
T: What's the weather like today?
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Revision
规则动词过去式的构成。
1）变化规则：
动词变化很好记，一般末尾加-ed;
如果词尾有个e，紧跟其后加个-d；
辅音加y来结尾，变y为i加-ed；
单元+单辅，双写辅音加-ed
2）读音规则：
注：特殊变化要熟记。
清后[t]，元浊[d]，[t],[d]后读[id]
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['fɔ:kɑ:st]
forecast v.预测，预报
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forecaster n.预报员 12
announcer
[ə'naunsə]
n.播音员，节目主持人 13
go over to 转到
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the next few…
接下来的几个……
在接下来的几天天气将要变化。 The weather will change in the next few days.
今天晚上，雨将会从西南方逐渐来临。
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雨逐渐地大起来了。
The rain is gradually heavy. 28
rain shower
n.阵雨
The whole country will have some rain showers in
the next three days.
在接下来的三天，全国将会有一 些阵雨。
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在接下来的三个月，这个城市将 会有大量阵雨。
This city will have lots of Байду номын сангаасain showers in the next
three months.
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thermometer
[θə'mɔmitə]
n. 温度计
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temperature ['tempəritʃə]
n. 温度
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degrees Celsius 摄氏度 [di'ɡri:z 'selsiəs]
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rise 上升
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fall [fɔ:l] v.降落, 落下
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Temperature will rise to 12 degrees Celsius in the day.
白天气温将会上升到12摄氏度。
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听录音，然后回答问题：下周天气会怎 么样？
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Picture 1
Announcer:
And now it's five to nine, and time for the weather forecast. Let's go over to Carla Dane at the London Weather Center. Carla.
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[wind] wind
n.风
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[bləu] blow v.吹
She’s blowing the dandelion.
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south west [ˌsauθˈwest] n.西南
north N
east
W
E
west
S south 18
From today , the wind will blow from the south west.
Weather forecaster:
Rain will come in gradually from the south west this evening. The whole country will have some rain showers in the next three days. some of them will be heavy.
The weather forecast
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Warming--up Revision New lesson Practice Summary
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W arming- up
1.Greetings:
Hello, boys and girls! Nice to see you again.
2. Learn a song.
从今天起，风将会从西南部吹过来。
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从明天起，风将会从东南部吹过来。
From tomorrow , the wind will blow from
the south east.
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bring in 带来
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air [ɛə] n.天空, 大气
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rain [rein] n.雨
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The wind will bring in warm air from the Atlantic.
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Revision
过去时的句子变化口诀：
过去时，时过去。 过去时态是否是，过去时间是标志。 否定句很简单，did 之后not添。 疑问句也不难，did置于主语前。 过去置于动词前，谓语动词需还原。
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New lesson
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Listen!
What is she talking about?
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The weather forecast
风将从大西洋带来暖空气。
bring in
v.带来
Atlantic
n.大西洋
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风将从澳大利亚带来潮湿的空气。
The wind will bring in wet air from Australia.
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gradually [ˈgrædjʊəlɪ] adv.逐渐地
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Rain will come in gradually from the south west this evening.
夜间气温将会下降至4摄氏度。
Night temperature will fall to 4 degrees Celsius.
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outlook [‘autluk] n.前景，展望
the outlook for… 对于……的前景 38
Listen to the recording, and then answer this question: What will the weather be like next week?