1) for是并列连词,不能置于含两个并列分句的句子的句首,只能将其放在两个分句中间。/ S3 J& f5 s" N# T M
判断改错:(错) For he is ill, he is absent today.' i$ _# t, p- `9 g& i0 S
(对) He is absent today, for he is ill.0 _% c4 ^7 }* Q: {, e9 ?5 U
2) so为连词, therefore一般为副词。例如:2 [0 t# Y4 U* e
He hurt his leg, so he couldn't play in the game. 他的腿受伤了,不能上场。 ( d* w/ D0 P( t( S6 ^% u0 h I think; therefore I exist. 我思故我在。