Subject-Verb-Object. Right? For many languages, the idea that the subject belongs up front is plain backward.

Singular subjects get verbs conjugated in the singular, and plural subjects get verbs conjugated in the plural. But language can get complicated.

This subject, verb, object (SVO) structure is the usual grammatical system for English and other languages like Mandarin, Spanish and Russian.

The object of "for" is the whole of the following clause, and not just the relative pronoun, and that clause should follow the proper rules of subject-verb-object grammar.