此句应该用so,
表示“因此,所以”时so是连词,可以连接两个简单句;而therefore是副词,准确的说是连接性副词,不能直接用来连接两个简单句,它可以放在句首,后面加逗号,也可以放在句中作为插入语。另外,and therefore 相当于so. 还有therefore常表示很强的推断,用法比较正式,而so则常用于口语中。试比较下面的句子
He is kind; therefore,/ thus we all like him.
He is kind , so we like him.
He is kind . Therefore/ Thus we like him.
追问那如果想用namely怎么用?