he used to be a teacher 他过去是一个老师!
he get used to taking a shower after playing basketball.他经常在打完蓝球后洗个澡!
当主句的谓语动词是行为动词时,used to之后的动词必须省略掉； 当主句的谓语动词是系动词时,（见问题补充
he used to be a teacher 他过去是一个老师!
he get used to taking a shower after playing basketball.他经常在打完蓝球后洗个澡!