as用于倒拆句，只要一种情况，那就是它是“虽然；固然”的意思。
等于though。如：(有3种特殊的倒拆的体例)
1. Though he is a child, he can speak 2 foreign languages.
=Child as/though he is, he can speak 2 foreign languages.
2. Though he worked hard, he failed again.
= Had as/though he worked,he failed again.
3.Though he might try, he wouldn't success.
= Try as /though he might,he wouldn't success.
倒拆构造分为两大类。1）是完全倒拆，望文生义是把句子构造完全倒过来，但一般只用于一般如今时和一般过去时。
2）部门倒拆，其构造就是一般疑问句的构造。
eg: Only by thia way can we finish the work.
Here comes a bus.
0