I saw them______(quarrel) yesterday afternoon.I saw them______(quarrel)this time yesterday afternoon.
I saw them【quarrel】yesterday afternoon.I saw them【quarreling】this time yesterday afternoon.
see sb do sth意思是:看见某人做了某事
see sb doing sth意思是:看见某人正在做某事
I saw them______(quarrel) yesterday afternoon.I saw them______(quarrel)this time yesterday afternoon.
I saw them【quarrel】yesterday afternoon.I saw them【quarreling】this time yesterday afternoon.
see sb do sth意思是:看见某人做了某事
see sb doing sth意思是:看见某人正在做某事