You may go, only come back early. (only =but)你可以走,但要早点回来。
He wants to buy the watch, only he can’t afford it.他想买这块表,但他买不起。
注5:however释义
adv.无论如何;不管怎样 However hard it may be, do your best.
adv.尽管如此;然而 Later, however, he decided to go.
adv. (表示惊奇)怎样;怎么 However did you find it?你是怎样找到它的?
conj.不管怎样;不管用什么方法 He can go however be like.他想怎么去都行。
2、whereas与while的区别
1.whereas = while
while前后句子之结构要求并列相对,whereas 在结构上则不一定不需要严格平行。(OG12-131)
whereas/while这种连词连接的比较成分不要求含义上绝对的平行
2.whereas连接的平行比较只要求对比的核心逻辑上有对称关系,不要求对称位置必须是对称名词,下面句子中主从句的主语分别是energy和nuclear power并不是对称名词,但是对比的核心都是“核能发电占总产出能量的份额”,如OG12-131:
Over 75 percent of the energy produced in France derives from nuclear power, whereas nuclear power accounts for just over 33 percent of the energy produced in Germany.
*:
但是如果whereas后面接介词短语,那么主句的开头也必须需要是介词短语(whereas后出现介词短语或者状语都会非常对称)如OG-113:
Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes fo