他清扫了教室。
He cleaned the classroom after school yesterday afternoon.
昨天下午放学后他打扫了教室。
He cleaned the classroom after school yesterday afternoon.
昨天下午放学他打扫了教室。
He told me that he had cleaned the classroom.
他告诉我他已经把教室打扫了。
The classroom can't have been cleaned by Li Ping because he didn't come to school today.
教室不可能是李平打扫的，因为他今天没来上学。
The classroom can't have been cleaned by Li Ping because he didn't come to school today.
教室不可能是李平打扫的，因为他今天没来上学。
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