文档介绍：In this lesson you will learn:
Clauses of reason with since, as and because.
The story of Goldilocks and the Three Bear
In this lesson you will learn:
Clauses of reason with since, as and because.
The story of Goldilocks and the Three Bears.
Warming up
Have you heard some western stories? What are they?
Have you ever heard the story called Goldilocks and Three Bears?
What do you think the story is about?
Let’s look at some pictures!
Pre-reading
Please skim the story and find the sentences which have “as”, ”since” and “because”.
Please work in pairs and predict the main idea of the story.
Sentences which show reasons
Since baby bear was very small, he had a small dish.
As the porridge was very hot, they decided to go for a walk while their porridge was cooling down.
She didn’t like it because it had too much salt.
Grammar
Q: when do you use “as", "since” and “because”?
Grammar explanations
An adverbial clause of reason explains the cause of an action in the main part of a sentence. We use conjunctions like because, as, and since to give a reason. Look at the position of the conjunctions. With as and since, we place these words at the beginning. Since emphasizes the main clause, we translate it into 因为or 既然。As also indicates reasons, but it has weak tone than since and it is not as formal as since.(表示原因的状语从句解释主语中动作的原因。原因状语从句由because, as 和since引导。这三个连词的位置不同, as和since引导的从句通常在主句之前。) since 侧重主句，常常翻译为“因为”，“既然”。As 也表示原因，但语气比since弱一些，没有since正式。
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As Goldilocks was too heavy, she broke Baby Bear’s chair!
Since Baby Bear was very small, he had a small dish.
With because, we often place it later in the sentence. The tone is strong.( Because 引导的从句通常在主句之后。语气通常比较强）
.
she didn’t like the bed because it was too hard.
Exercise
Write sentences in your notebooks connecting the following ideas using because, as, or since.
he asks you, please tell him the reason.
I had a cold, I was absent from school.
I didn’