Be of effect
有效
🧩 词语组成解析
be
[bi]
v. 是;有，存在;做，成为;发生;
aux. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
Very few people last in this class for the full hour the very first time.
很少人能够第一次撑完一个小时的课。
No man (or one) is wise at all times.
聪明一世糊涂一时。
Thanks.
谢谢。