改否定句:l konw a lot about public signs

改否定句:l konw a lot about public signs I know a lot about public signs.改成否定句I ()()a lot about publi I,public,now,know,signs,about,lot,a 连词成句 Now she ____(know) a lot about public signs. now l know a lot about public 为什么Now I know a lot about public signs中,不用a lot of 而用a lot a park,see,lot,can,signs,a,he,in,of,the,public(.)连词成句 连词成句 signs,the,educate,public,about,for,the,caring,helpful,a 英语冠词改错题Ben knows a lot of about public signs,  写下原因IS t 30.( )I learn a lot _____ public signs. He sees some public signs here (否定句） now l know a lot of about the signs哪里错了