although 和but能一起用吗
although可以用什么替换?最好是从句？
although可以用什么替换?最好是从句？
一般引导让步状语从句.比如Although he was tired ,he still worked hard.尽管他已经退休，他还恪尽职守，兢兢业业。
引导的从句放在主句前后均可,有时还可放在句中. 例如： Although many difficulties are still ahead, we are determined to make greater achievements. 尽管在前面的道路上还有许多困难,但是,我们决心要取得更大的成就. He often helps me with my English although he is quite busy. 尽管他相当忙,但是还常常帮我学英语. 4. although引导的从句不能与but, however连用,但可与yet, still连用.不能说：Although he was old, but he worked hard. 应把but去掉.当然,保留but而去Although也可. 5.在让步状语从句中,although一般可以用though和while来替换. 6.在时间，条件，地点，方式，让步等状语从句中，如果从句主语和主句主语相同，或者从句主语是it时，从句的主语和谓语动词的一部分经常省略。例如Although (he was ) tired,Tom kept on working till late at night.
while，but和whereas三个词怎么区别？
but是这三个连词最普通的一个，它可以连接两个并列成分或两个并列分句，意为“但是，然而”。如:Mary likes classical music but her husband likes rock music. 但在使用时要注意:but不能与though/although连用。其次but词性不一样意思也不同，比如作介词，常与nothing nobody who all等连用，意为“除……之外”。如: We had nothing to do but wait.
而连词while在对比情况下使用意思是“而然而”。但和主句连接时要用逗号和主句隔开，来看一个成语感受体会一下 Honey is sweet while the bee stings. 蜂蜜很甜 但蜜蜂有刺蜇人。
从属连词whereas也可以引出表示对比、对立或直接相反的状语从句，是三个连词中最正式用法，语气强并且书卷气较重，通常多位于居中，也可置于句首;和while一样通常多用逗号隔开如His parents were rich whereas mine had to struggle.