can't decide when I should go for a holiday.
同义句转换 I can't decide when to leave for a holiday.(三个词)
Tom is the same age as Anna.
同义句转换 Tom is as old as Anna.(三个词)
I can't decide (when to go) for a holiday.此为用疑问词+to do 的用法，可以在句中做主语，宾语，表语。
Tom is as old as Anna.此为平级的比较通常用as...as结构,否定句用not so/as...as.
英语同义句转换练习
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