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L Expressing reason<br />

Because, as and since<br />

Because, as and since:<br />

r introduce the reason for something<br />

. go <strong>at</strong> the beginning or in the middle of a sentence:<br />

They had <strong>to</strong> choose him as /because / s'ince he's the coach's nephew.<br />

As / Becutse / Since he's the coach's nephew, they had <strong>to</strong> choose him.<br />

Notice th<strong>at</strong> if they go <strong>at</strong> the beginning, there ii usually a comma in the<br />

middle of the sentence.<br />

Because is stronger than as and since, but they <strong>are</strong> often used in a<br />

similar way:<br />

As / Since / Becantse I hadn't done my homeworle, I didn't understand<br />

the lesson.<br />

h, Because (but not as or since) can be used <strong>to</strong> begin the answer <strong>to</strong> a<br />

question beginning vnth wlry:<br />

Question: Why didn't <strong>you</strong> understand the lesson?<br />

Answer: Beca.use I hadn't done my homework. (notW<br />

ry+emew€&)<br />

5o and therefore<br />

So and therefore:<br />

o introduce the result of something.<br />

So usually goes in the middle of a sentence:<br />

They may need a new goalleeeper so I want <strong>to</strong> be ready.<br />

Therefore goes <strong>at</strong> the beginning of a new sentence:<br />

They may need a new goalleeeper. Therefore I want <strong>to</strong> be ready.<br />

We could also say:<br />

I want <strong>to</strong> be ready because they may need a new goalkeeper.<br />

Comp<strong>are</strong> these sentences, which have the same meaning:<br />

I hadn't done my homework so I didn't understand the lesson.<br />

I hadn't done my homework. Therefore I didnl understand the lesson.<br />

As / Since / Beca.use I hadn't done my homework, I didn't understand<br />

the lesson.<br />

So is more common in speaking.<br />

Therefore is more common in writing.<br />

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