《The Study of Living Things》Look into Science! PPT

发布于：2020-05-03 13:58:13

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《The Study of Living Things》Look into Science! PPT下载

第一部分内容：Think about it！

1.Would you like to be a biologist when you grow up? Why or why not?

2.What mysteries of nature do you know about?

Read the lesson and complete the table.

Fantastic facts about butterflies

The butterflies always_________to the same small piece of forest and________the winter there.

·The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.

·The females________eggs on only one plant:milkweed.

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The Study of Living ThingsPPT，第二部分内容：Main phrases:

·draw one’s attention

·as many as…

·leave for

·cut down

Main sentences:

·Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention.

·The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.

·When they begin to travel north in spring,the females lay eggs.

·Scientists still don’t understand how the butterflies know when to fly south.

·This is both puzzling and interesting for many scientists.

·There are many mysteries yet to be discovered by those interested in science.

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The Study of Living ThingsPPT，第三部分内容：教材解读

1.Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention.

◆have been doing sth.是现在完成进行时,意为“一直在做某事”,表示从过去某时开始的某个动作或状态一直延续到现在,而且还在进行。常常表示动作的延续性、重复性以及感情色彩等。

◆draw one’s attention意为“吸引某人的注意力”。

2.Here,as many as 230 million butterflies spend the winter.

◆as…as…意为“与……一样……”,两个as之间可加形容词或副词的原级;也可加“many+复数名词”,“much+不可数名词”或“形容词+a/an+单数名词”,还可以在as…as…前加twice,half等词表示前后者倍数或分数关系。as…as的否定形式为not as/so…as…。

◆spend为及物动词,意为“度过,花(钱/时间)”,常用于固定结构:spend time/money(in)doing sth.花费时间/金钱做某事;spend time/money on sth.在某物上花费时间/金钱;spend time with sb.和某人一起度过时光,句子的主语应为人,spend的过去式和过去分词都是spent。

3.The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.

◆that return to the south和that left for the north都是定语从句。

◆leave for意为“动身去……”。leave意为“离开”,是位移动词,可使用现在进行时表将来;leave与表示一段时间的状语连用时,应改为be away(from)。

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The Study of Living ThingsPPT，第四部分内容：Practice

Join the sentences to make attributive clauses.

Example:

We did some experiments yesterday.The experiments were fantastic.

The experiments that we did yesterday were fantastic.

1.I asked him to mail the letter.I wrote the letter to my cousin.

2.Yesterday I met a boy.The boy is a new member in our art club.

3.Mary was carrying a bag.The bag cost her a lot of money.