By saying postdating a check,I mean you can write the check with a date that is later than the acutal date,so that it wont become effective until that time.
想问一下老师：
1 postdate查了下它本身有名词使用方法，为何原句还需要动名词呢？
2 “with a date that is later than the acutal date” 这里的with是讲解为“用”么，所以so that从句是表目的？
句子结构剖析如下：
By saying postdating a check,（方法状语）I mean you can write the check with a date that is later than the acutal date, （宾语从句）so that it wont become effective until that time. （目的状语从句）
1.容易见到结构：By saying.... I mean...； 或者I mean...by saying...
2. postdate 可以是动词，意思是：“把......日期填迟；填写......时推迟日期”。postdating a check 是动名词作say 的宾语。
3. with a date 作write 的方法状语；that is later than the acutal date 是date 的定语从句。
4. 本句so that 引导目的状语，不是结果状语。由于从句的动作尚未发生，是以后事件，目的性明确。结果尚未显现，就构成不了结果状语。
By saying postdating a check,I mean you can write the check with a date that is later than the acutal date, so that it wont become effective until that time.
【翻译】我的意思是，你可以在支票上写一个比实质日期晚的日期，如此直到那时支票才生效。
By saying postdating a check，一般无需翻译出来，由于这个词组跟 mean 的宾语从句内容相同，宾语从句是对这个词组的进一步讲解或说明。
