- The government have promised (that) they’ll reduce income taxes. (政府已承諾要降低所得稅) (正)
The government have promised (that) they reduce income taxes. (誤) - I promise (that) I won’t tell your wife. (我答應不會告訴你太太) (正)
I promise (that) I don’t tell your wife. (誤)
解說：Promise 可當名詞和動詞用，主要意為「允諾，答應；保證」。用作動詞時，promise 可接 that 引導的名詞子句 (that 可以省略) 或帶 to 的不定詞。若接名詞子句，子句中須有 will 或 would。下面為使用過去式 would 和不定詞的例句：
- He promised (that) he would attend my wedding on Saturday.
= He promised to attend my wedding on Saturday. (他保證週六會參加我的婚禮) (正)