she ofen washes her clothes.（改为一般问句）she did’t phone him yesterday.（改为肯定句）
china’s flag is red.（改为一般疑问句）I saw a film with my friende this afternoon.（改为否定句）he didin’t do it just now.（改为肯定句）they were in the office this morning.（改为一般现在时）