陈述句如何变宾语从句加that.We know (that )your are clever
一般疑问句如何变宾语从句 用whether 或 if.We wonder if/whether you know about English
这里whether 与 if区别是：如果有or not ,用 whether.介词后用 whether.whether+不定式.例如
1)We wonder whether go there or not .
2)We wonder whether to go there .
3)It depends on whether you like English
特殊疑问句如何变宾语从句仍然用原来的疑问词.例如：Do you know how long he will stay here?