Stop looking at the blackboard改为否定句

Stop looking at the blackboard改为否定句 the boys are looking at the blackboard改为否定句. Look at the blackboard 改为否定句 Look at the blackboard.改为否定句（ ）（ ）look at the blackboard look at the blackboard,please.改为否定句的答案 we will meet at the bus stop(改为否定句) Tom is looking at the blackboard(改为祈使句) The students are looking at the blackboard同义句 Write the words on the blackboard ,please改为否定句 Stop the car,piease .改为否定句 write down your name on the blackboard改为否定句 my teacher is drawing on the blackboard改为否定句