[pacerier]

thanks for the info ^^

anyway in 卒業するのができる (is there a kanji for できる?), is it true that the problem lies with のができる. in other words is it true that this is incorrect as well:
勉強するのができる


also can we use 止める to refer to "parking bicycles", likewise can we use 置く to refer to parking cars. in other words will all of these be acceptable:
あそこに自転車を置かなければなりません
あそこに自転車を止めなければなりません
あそこで車を置かなければなりません
あそこで車を止めなければなりません
if the red に is changed with a で will the 2 sentences above still be valid?



on a side note, do we usually write the なければなりません conjugation with kana or kanji