Using past as a preposition
Q1. She walked ___ me without saying hello
PAST is the preposition meaning beyond. PASSED is the verb. The greeting was withheld. Rudeness noted.
Q2. He drove ___ the turnoff
PAST indicates going beyond a point. The turnoff was missed. Navigation requires attention.
Q3. It is half ___ six
PAST is used in time expressions. Six-thirty is the time. Appointments may be missed.
Q4. The ball went ___ the goalkeeper
PAST indicates movement beyond. The goalkeeper was beaten. Goal scored.
Q5. Which sentence is correct?
PAST is the preposition. PASSED is the verb form of pass. Grammar distinguishes them clearly.