therefore的用法
1.整句中时一般不放,句末,句首后要有逗号。句中:1、按一般副词使用;2、做插入语。
(1)Therefore,we must learn English well.
因此,我们必须学好英语。
(2)They therefore can learn English well.
因此他们能学好英语。
(3)Many fast food restaurant ,therefore,have red furniture or walls.
因此,许多快餐店都有红色的家具或墙壁。
2.这时一般词前要用分号,其后用不用逗号无所谓。若第二个分句前是逗号或无符号,则要注意therefore是副词,和so不一样,要保持句子完整,应用and therefore。
(1)I had a headache;therefore I could not go to your party.
我头痛,所以不能参加你的聚会。
(2)I was ill,and therefore could not come.
我病了,所以不能来。