。
The train should arrive at noon.
Literal
Train [topic-は] noon [at-に] arrive [should-はず] [copula-です].
はず ('expectation, ought to be') is a nominal form used as the head of a predicate, marking an expected or logically deduced fact — 'it should be the case that X.' Different from ~べき ('should' as obligation) and ~だろう ('probably'): はず implies confidence based on reasoning or information.