改错1.The teacher looked angry at the students 2.They must have arrived till now

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改错1.The teacher looked angry at the students 2.They must have arrived till now

改错1.The teacher looked angry at the students 2.They must have arrived till now
改错1.The teacher looked angry at the students 2.They must have arrived till now

改错1.The teacher looked angry at the students 2.They must have arrived till now
1、 angry 改为angrily,修饰动词 look at.
2.arrived 改为been.

1.把at改为with
2.把have改为be

1.把angry改为angrily,动词应该用副词修饰;
2.把till改by,must have done是对过去事情的猜测,till now是指现在。

1.looked改成is
2.till去掉