肯定句变为否定句
技巧1:
当句中含有情态动词或助动词could,would,should等时,可直接在其后面加not构成否定句。例如:
Icouldgetyouaconcertticket.→Icouldnot/couldn'tgetyouaconcertticket.
技巧2:
当句中含有系动词was,were时,可直接在其后加not构成否定句。例如:
IwasontheInternetwhenyoucalledme.→Iwasnot/wasn'tontheInternetwhenyoucalledme.
技巧3:
当句中谓语是除情态动词、助动词、系动词was,were以外的动词时,在该动词之前加didnot/didn't,动词还原,构成否定句。例如:
ThefamoussingersangsomeChinesesongs.→Thefamoussingerdidnot/didn'tsinganyChinesesongs.