account
1.on his(或your等)own account和of his(或your等)own accord不可混用。参见 accord 2
2.on account of(因为)里用on,现在很少用upon。
3.注意On no account (决不) should we neglect our work里用should we,不用we should。
4.He is of no account和He is a person of no account(他不是重要人物)都是正常的英语,He is no account和He is a no-account person都是美国口语。
5.account后面可以接宾语和表语,如I account him wise和I account him a wise man。在宾语后面有时加上to be,有时加上as,但都不普通。