1、介词+名词
by accident 偶然
on account of 因为,由于
in addition 另外
in addition to 除......之外
in the air 在流行中,在传播中
on (the/an) average 平均,一般来说
on the basis of 根据,在......的基础上
at (the) best 充其量,至多
for the better 好转,改善
on board 在船(车、飞机)上
out of breath 喘不过气来
on business 因公,因事
in any case 无论如何,总之
in case of 假使,万一
in case 假使,以防(万一)免得
in no case 决不
by chance 偶然,碰巧
in charge (of) 负责,主管
(a) round the clock 昼夜不集地
in common 共用,共有,共同
in conclusion 最后,总之
on cond0ition that 在......条件下
in confidence 信任
in connection with/to 关于
in consequence 因此,结果
in consequence of 由于......的缘故
on the contrary 反之,正相反
in contrast with/to 与......成对照
out of control 失去控制