Look at the blackboard.改为否定句( )( )look at the blackboard

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Look at the blackboard.改为否定句( )( )look at the blackboard
Look at the blackboard.改为否定句( )( )look at the blackboard

Look at the blackboard.改为否定句( )( )look at the blackboard
Do not look at the blackboard.

Please don't

Please don't

Do not look at the blackboard.
祈使句变成否定句

Do not look at the blackboard.
前句为Please look at the blackboard时,才改成please don't look at the blackboard

Do not look at the blackboard.
祈使句的否定句,在动词前面加don‘t

Do not= don't
look 看
don't look 不看