一,as often as用于字面义,表示“与……一样经常”,可视为as…as结构与often的自然搭配;若用作习语,则表示“每当”。如:
I don’t visit my parents as often as I should. 我去看望的次数不够经常。
As often as I tried to phone him the line was engaged. 每次我给他打电话都占线。
另外,习惯搭配as often as not的意思是“往往”“通常”,不能按字面来理解。如:
As often as not, he forgets his homework. 他常常忘做家庭作业。
二,其他的还有:
as soon as 字面意思为“与……一样快”;作为习语,其意为“一……就”。
as long as字面意思为“与……一样长(久)”;作为习语,其意为“只要”。
as well as字面意思为“与……一样好”; 作为习语,其意为“不但……而且”“既是……也是”“而且”“还”。