smn2000
幼苗
共回答了16个问题采纳率:93.8% 举报
I haven't seen (A )this since I collect stamps.
== I haven't seen such an old stamp as this since I collect stamps.
注意
I haven't seen as old a stamp as this one == shch an old stamp as this one since I began to collect stamps 在语法上是更容易被接受的句子
1年前
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smn2000
可以,但必须是否定句 I have never seen SO / AS old a stamp as this one.===I have never seen such an old stamp as this one.