自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
PREP-PHRASE 而非；胜于；而不是 You use rather than when you are contrasting two things or situations. Rather than introduces the thing or situation that is not true or that you do not want.
The problem was psychological rather than physiological...
Sedge is similar in appearance to grass but has a solid rather than a hollow stem...
ADV 而是；更确切地说；还不如说；相反 You use rather when you are correcting something that you have just said, especially when you are describing a particular situation after saying what it is not.
Twenty million years ago, Idaho was not the arid place it is now. Rather, it was warm and damp, populated by dense primordial forest...
But there must be no talk of final victory; rather, the long, hard slog to a solution...
PHR-MODAL 宁愿/不愿；宁可/宁可不 If you say that you would rather do something or you'd rather do it, you mean that you would prefer to do it. If you say that you would rather not do something, you mean that you do not want to do it.
If it's all the same to you, I'd rather work at home...
Which programme would you rather appear on?...
ADV 有些;颇为;相当 You use rather to indicate that something is true to a fairly great extent, especially when you are talking about something unpleasant or undesirable.
I grew up in rather unusual circumstances...
It had made some rather bad mistakes which I thought should be corrected...
ADV （放在动词前）更…，宁愿… You use rather before verbs that introduce your thoughts and feelings, in order to express your opinion politely, especially when a different opinion has been expressed.
I rather think he was telling the truth...
I rather like the decorative effect.
CONVENTION （表示同意或接受）当然，的确 People sometimes say rather to express agreement or acceptance.
'Well, he did have a sort of family connection with it, didn't he.' — 'Oh yes. Rather.'