想举行聚会用英语可以说是 "to have a party" 或 "to throw a party"。这两个说法都表示你有意愿举办一个聚会。
来源：
"To have a party" 源于动词 "to have"，这里的意思是 "to possess or own something"。例如：
I have a car. (我有一辆车。)
She has a beautiful voice. (她有一个美丽的嗓音。)
后面加上名词 "party"，表示 "a social gathering"，就变成了 "to have a party" 这个短语。
"To throw a party" 源于动词 "to throw"，这里的意思是 "to cause something to go in a particular direction by a quick movement"。例如：
She threw the ball to me. (她把球扔给了我。)
He threw the book on the table. (他把书扔到了桌子上。)
后面加上名词 "party"，表示 "a social gathering"，就变成了 "to throw a party" 这个短语。
例句：
I'm thinking of having a party this weekend. (我正在考虑这个周末举办一个聚会。)
They're throwing a party to celebrate their anniversary. (他们要举办一个聚会庆祝他们的结婚周年纪念。)