转换句型为一般疑问句、否定句、肯定否定回答

一般疑问句: Is grandpa pretty healthy because he exercises every day?
否定句：Grandpa is not pretty healthy because he exercises every day.
至于肯定否定回答，不清楚你是问对疑问句的回答吗？
这类问题首先明确句子的成分，是对句子的主干进行句式的转变，即主谓宾，because后面为状语！