不是。
n. 教師導師This is my teacher Mr. Jones.
這是我的老師Jones先生。
This teacher is worse than our last one!
這個老師比我們上一個老師還差！
She's a very capable teacher.
她是一位能力很強的教師。
He was a failure as a teacher.
他當教師並不成功。
'Be quiet，' said the teacher.
“安靜點！”老師説道。
As a teacher， he's a disaster.
他當老師壓根兒就不稱職。
不是。teacher有它的複數形式，直接在後面➕是。集合名詞應該是像family. people sheep這種單複數同形的
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