我個(gè)人認(rèn)為a lot of fun的同義詞應(yīng)該是much fun.

在英語中，a lot of fun中文意思是“許多樂趣”，最好的短語是have a lot of fun,我們多用have much fun.也可以用have a good time.＝enjoy oneself.

例如：They had a good time last Sunday.

＝They enjoyed themselves last Sunday.

＝They had fun last Sunday.

希望我的回答能夠盡快幫到你啊。