Simple past and past participle of have

• Possessed or owned
• Included or contained
• Ate, drank, or used
• Experienced, underwent, or enjoyed
• Suffered from or was affected by
• Hosted, held, or conducted
• Gave birth to; produced
• Received or obtained

have 的一般过去时和过去分词

• 拥有、占有
• 包含、包括
• 吃、喝、使用
• 经历、遭遇、享受
• 罹患、受…影响
• 招待、举办、进行
• 生育；产生
• 收到、获得

Auxiliary forming the past perfect

• Marks action completed before a past time
• Used with a past participle

构成过去完成时的助动词

• 表示早于另一过去时间已完成的动作
• 与过去分词连用

Past of have to

• Meant was obliged or required to

to have to 的过去式

• 表示必须；不得不