Have got to 和 have to 為同義詞，意思是「必須，不得不」，其中 have got to 比較常用於口語以及非正式的情況或上下文中。我們在此使用 have (got) to (第三人稱則將 have 換成 has) 來指這兩個動詞。
Have got to 和 have to 的肯定形式
Have (got) to 位於主動詞之前。例如：
- I have got to finish this today. (我今天必須完成這件事)
- We have to go to Tokyo tomorrow on business. (我們明天得去東京出差)
Have (got) to 經常縮略，尤其是在口說時。例如：
- I’ve got to finish this today. (我今天必須完成這件事)
- We’ve to go to Tokyo tomorrow on business. (我們明天得去東京出差)
當主動詞及其受詞、補語等不言可喻時，have (got) to 可單獨存在 (以避免重複)。例如：
- John: Does Mary have to talk to her mother on the phone every week. (約翰：瑪麗每週都得跟她母親通電話嗎？)
Paul: Yes, she has (got) to. (保羅：沒錯，她必須這樣做)