thus so therefore用法

1.therefore
adv.因此, 所以=for that reason=consequently；用于对某事的推论。
常用于连接两个并列分句，其前加“and”或分号“；”。
therefore 表结果时，比so正式些，常与and连用
He was ill, and therefore could not come. 他病了, 所以未能来。
He has broken his leg and therefore he can't walk.他摔坏了腿，因此不能走路了。
We do not have enough money. Therefore we cannot afford to buy the new car.我们的钱不够,因此买不成这辆新车。
2.so conj. adv因而, 所以, 结果是
It was late, so we went home. 天晚了, 所以我们就回家去了。
He was sick, so they were quiet.他病了，所以他们很安静。
3.Thus
adv.如此，像这样；因此；于是
thus强调：
1.强调用什么方式
2.达到某种程度或范围；这么
He sold his farm and thus he had enough money for his journey.他卖掉了农场，这样他就有足够的钱旅行了。
There has been no rain — thus, the crops are drying.天没下雨，因此庄稼要枯死了。
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Therefore, so与thus
二者都是副词 都表示因此,所以,如此
therefore 和 thus用法基本相同,但用时侧重点不一样.
therefore侧重
1.结果,2.用于对某事物进行推论
thus
1.强调用什么方式
2.达到某种程度或范围；这么
3.同Therefore; consequently用法相同

therefore表结果,比so显得更正式一些,在句中常与and连用；
如：
He was very tired, and therefore he didn't give the market report.
他非常疲倦,所以没能作市场报告.
2.We have a growing population and therefore we need more food.
我们的人口在增长,因此我们需要更多的食物.
3.It was snowing, and so I could not go out.
天在下雪,所以我无法外出.
4.It was already rather late, thus we decide to urge the customer.
已经相当晚了,所以我们决定催促客户
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