'Clean up the window' You need this one: Clean the window if it is dirty . 'clean up' is not so often used with the simple or regular cleaning of single objects that are dirty from normal use. More often we 'clean up' a place or situation that is in extreme disorder or extremely dirty because of some special circumstances.
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AnonymousIs it correct to say clean the window If the window is dirty?Can I also use 'clean up' instead of 'clean' here?'Clean up the window'You need this one: Clean the window if it is dirty.
CalifJim'clean up' is not so often used with the simple or regular cleaning of single objects that are dirty from normal use.Does this mean I still can use 'clean up' to mean 'removing the dirt'' as in 'Clean up the window if it's dirty'?
CalifJimAfter the banquet, the kitchen was a mess. We had to clean up the [kitchen / mess].