Conjunction: while- түр хугацаа, цаг зуур
Араасаа өгүүлбэр авч хэрэглэгддэг.
Example: I don’t chewing gum while I attend in the lesson.
You mustn’t interrupt me while I am speaking
While she was teaching the lesson the lights went out
Preposition: From-аас
Чиглэл заасан угтвар үг бөгөөд аас илэрхийлнэ.
Example: I am from Mongolia
Plague was brought to the city by rats from cargo ships
It is believed that plague disappeared from london