Be formed of
由…形成
🧩 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;
a. 成形的, 成形
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
Until today, I was never really interested in medicine.
直到今天 ，我才对医学真正感兴趣。
What will you do the day after on next?
后天你干什么？
The ground supported fewer plants, and the insects which lived on these plants died out.
地上长的植物少了，生活在这些植物上的昆虫就消亡了。