Abstract: This paper takes a systemic functional approach to the syntactic analysis of the “N+to+V” construction in English, especially the relations between the noun and the verb of infinitives in it. This paper, as well, discusses the nominal group and different relations between clauses in clause complex. The analysis indicates that there are different kinds of semantic relations and functions although they share the same syntactic form of “N+to+V”, and it also shows that SFG has its great power and advantages in guiding the language learning and teaching.