necessarily

1.An Englishman does not necessarily speak perfect English里的does不可改作need。

2.He may not necessarily know what has happened里的necessarily是多余的。

3.下面两句意思相同：

• The policy of the magazine is necessarily to devote most of its space to subjects of general interest.
• The policy of the magazine must necessarily be to devote most of its space to subjects of general interest.