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“Stole a dollar?”
Mr. Levering was shocked, feeling a cold shiver.
“Emma Wilson saw it all, and they found the dollar in his pocket,” his son explained.
“He looked so pale, and he was crying so much.
I felt bad for him.
They sent for his mother, and she took him home.”
“It must have been hard for his mother,” Mr. Levering said.
“But even worse for such a small child,”
his
wife added.
wife added.
“He’ll always remember
his crime and disgrace.”
his crime and disgrace.”

“It must have been hard for his mother,” Mr. Levering said.
「must+have+과거분사」는 ‘틀림없이 ~했을 것이다’라는 뜻으로, 과거의 일에 대한 강한 추측을 나타낸다.