for 当因为讲的时候,后面能跟句子,但是它和because的用法是相同的,不能将它单独的放在一个句子前面,要有上下文。 例如:However, as the evidence began to accumulate, experts from the Zoo felt obliged to investigate, for the descriptions given by people...
能. The children soon lost their way,for they had never been in the forest before.孩子们很快迷了路,因为他们从未进过这座森林./He took the food eagerly,for he had eaten nothing since dawn.他吃得很香,因为自天亮起他就没吃东西.