高一英语句型转换

高一英语句型转换
1、I don't know if he'll come on time.
What we want to know _ _he 'll come on time.
2、When he was asked why he was late,he didn't say a word.
When _why he was late ,he_ _.
3、I have found it hard to learn Spanish.
I have found Spanish ＿ ＿ ＿．
4、I say sorrily that we can't stay here any longer.
I＿ ＿ ＿that we can't stay here any longer.