Suppose there are some options or solutions which are selected based on some cases... What are different ways (patterns) to make a sentence with case?
if it is the problem..... in such case ? (to refer to the mentioned problem), we should select this option ... , in cases (or in the cases?) (that/in which or where ?) we don't need this thing.... we can select this option. This option is for [the ?] cases where ? this thing exists...
Is my usage of cases, the articles, prepositions like "for" and relativizers like "where" and "that" are correct?