Question

10．可以肯定的是，他的决定基于父母的帮助和支持．
It wascertain （that） his decision was based on his parents'help and support．

Answer 1

分析 certain （that） his decision was based．

解答 答案：certain （that） his decision was based．结合中英文，这里是应it作为形式主语，that从句作为真正主语，构成句型it is certain that，表示毫无疑问…肯定…，这里是一般过去时，故it was certain that，that可以省略，从句也用一般过去时，表示基于…用be based on，主语是他的决定his decision单数，故用was based on，故答案是certain （that） his decision was based．

点评 It+be+形容词+that-从句的句型有：It is necessary that-有必要--It is important that-重要的是--It is obvious that-很明显--b．It+be+-ed 分词+that-从句 It is believed that-人们相信--It is known to all that-从所周知