She lets her mother know about her sadness.改成否定句

She lets her mother know about her sadness.改成否定句 she is as taii as her mother把它改成否定句,怎样改 clindy helps her mother do housework 改成否定句 英语she helped her mother yesterday 【变否定句】 she helps her mother do the housework(改为否定句) She must wait for her mother 的否定句是什么 She has heard from her mother last week.的否定句She( )from her m I know how she [miss]her mother. she is worried about her sick mother That is her backpack 改成否定句 i know her name .(改为否定句) I know her name 改为否定句