He put up some signs asking for help分析此句子的成分：asking for help 是现在分词短语作后置定语吗?另外在不考虑句子译文的情况下可不可以把asking 改成 to ask 解释为不定式短语作目地状语.

he put up some signs asking for bikes.可以是he put up some signs to ask He also put up some signs asking for old bikes解释 They decided put up some signs 错在哪里? He also put up some signs asking for old bikes.为什么用asking ,用to ask 可 He also put up some signs asking for old bikes.这句话中好像是现在分词作后置定语修饰signs,但是signs如何能主动ask for呢?请释疑. We could put up signs When_____they____(put up)these signs? I'm making some signs to put up around the schooI'm making some signs to put up around the school.To一般什么时候加 I am going to make some signs to put up around的同义句改为I（ ） （ ）make some signs to put up around the neighborhood He also put up some signs asking for old bikes.为什么用asking不用to ask?还有waste time doing sth和这个是一个道理吗 He also put up some signs asking for old bikes.中的asking for old bikes是伴随状语还是宾语补足语. he also put up some signs asking for old bikes and这里asking for old bikes 是伴随状语是吗?这里可以改为 to ask I am making some signs to put up around the school是什么意思 He also put up signs asking for old books.中的asking for old books What was Jimmy going to do?—He was going to put ______ some signs ______ old books.What was Jimmy going to do? —He was going to put ______ some signs ______ old books. [ ]A.up; asking for B.on; to ask to C He also put up some signs asking for old bikes and called up all his friends~为什么用asking而不用ask called为什么用过去式最好的能说一下什么是定语,伴随状语 What was Jimmy going to do?He was going to put ______ some signs ______ old books.A up ； asking forB on ；to ask toC up； asking toD down ；asking for He is putting up some signs asking for old booksHe is putting up some signs asking for old books and magazine.为什么要用ask的ing形式