[译] 在你方便的时候请来看我们。
[误] Please come to see us when you are convenient.

[正] Please come to see us when it is convenient for you.
[注] convenient表示"方便的"，其主语不可以用表示人的词，并通常用在it is convenient for sb. to do sth.（对某人来说做某事方便）的句型中。