Be unable to
成人 Adult Edu不能/不会(做)...
🧩 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;
to
[tu,tə]
prep. 向，朝着;到;关于;属于;
adv. 朝一个方向的;到某种状态;关闭;
🗣️ 情景例句
You can sing a lot more clearly than I can.
你能比我唱得更清晰。
We need them urgently.
我们急需这些资料。
and of what had previously been wrong with his wife,
也不知道他妻子以前得的是什么病，