I have only , only 修饰宾语，I only have, only 修饰谓语
have only例句：
1.For all this I have only you to thank.
这一切我都得感谢你才是。
2.I have only a bowing [ nodding] acquaintance with him.
我和他只有点头之交。
3.The
young man is dead. We have only to consider the living.
这位年轻人已经死了。我们只能考虑在生之人。
4.We have only a few hours 'grace before the soldiers come.
士兵到来之前我们只剩下几个小时了。
only have例句：
1.My life is ruined and I suppose I only have myself to blame.
我的一生都毁了，我想这只能怪我自己。
2.The staff in the London office are helpful but only have limited information
伦敦办事处的工作人员给予了帮助，但他们掌握的信息有限。
3.You only have an hour to complete the game so it's a mad dash against the clock
你只有一个小时来完成这场比赛，所以得铆足劲头争分夺秒。
4.Any time you want a babysitter, dear, you only have to ask
亲爱的，你什么时候需要人帮忙照看孩子，只要开口说一声就行。