1. Proximity principle: there/here+be/ copula, there ... or ..., there ... is not ... not only ... but (also) ..., not ... but ..., the score/percentage modifier (outside the population category) means more.
2. The principle of distance: and (together/along) and, not, except/idea/but/including.
Not only you but also I am right.
Two thirds of the earth is covered with water.
Many students in our school have never been abroad.
It is he, not I, who is right.
There are only two students in the classroom.