to add sth on;to add on sth：另外加上；额外加上；扩建；加盖

• Many loan application forms automatically add on insurance.

  很多贷款申请表会自动附加保险。

• To the rear is a large dining room, added on early this century.

  后部是一个本世纪初加盖的大餐厅。

• A new bathroom has been added on to the back of the house.

  房子后面加盖了一个新浴室。

• Work out the annuity and then add interest on to it.

  算出年金后再加上利息。

• A 9 per cent service charge will be added on to the bill.

  账单上会额外加上9%的服务费。