you should follow the SOV pattern which is Subject Object and Verb,,Remember that the Verb always at the end of the sentence. And the prepositions(English Grammar) in japanese are postpositions they always follow after the word they link or connect.
for example.
SOV pattern
Nakamura-san wa bengoshi desu
nakamura-san is the subject
bengoshi(lawyer) is the object
desu is the verb(VERB BE in particular or "is" translation in english)
POSTPOSITIONS
Watashi wa Nihon kara kimashita
watashi - subject
kara - postposition it comes after the word NIHON (from japan - translation)
kimashita - verb which means came