promise的双宾语应加to。
例句
1、
All parties are promising to increase spending on health.
各政党都在许诺增加医疗开支。
2、
The government has promised to cut hospital waiting lists.
政府已许诺减少排队看病者的人数。
3、
She was determined to exact a promise from him.
她决意要他作出许诺。