Examples of using Hard to keep in English and their translations into Dutch
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                        Colloquial
                    
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                        Official
                    
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                        Ecclesiastic
                    
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                        Medicine
                    
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                        Financial
                    
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                        Computer
                    
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                        Ecclesiastic
                    
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                        Official/political
                    
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                        Programming
                    
It's hard to keep track of.
Easy to  love and hard to keep.
It is hard to keep your footing on ice with long nails.
Children must study hard to keep improving in their studies.
It's hard to keep track of the hook-ups.
It's getting really hard to keep track of who knows whose secret identity.
Hard to keep track.
It's hard to keep the names and the faces straight.
It's hard to keep precious things.
Hard to keep these aliens straight without a scorecard.
It's hard to keep a positive attitude.
It's hard to keep paying attention.
Hell it's hard to keep track of sometimes.
Hell, it's hard to keep track of sometimes.
are quite hard to keep.
On top of that it was considered too hard to keep doing it.
For Catherine, you were easy to  get and hard to keep.
An infinite number of different nutritional models make it hard to keep track.
And hard to keep. For Catherine, you were easy to  get.
Sounds easy but hard to keep.