Bases / Basis
1) Bases
Bases means the underlying supports
كلمة بمعني القاعدات أو الأساسات (عادة تستعمل للديث عن الأمور الحسية / المادية)
Example: I saw a skyscraper built on a base of solid rock
The base of the pyramid is very wide
2) Basis
Basis means the groundwork
كلمة بمعنى أساس (عادة تستعمل للدلالة على الأمور المعنوية)
Example: The nurse is paid on an hourly basis
He was chosen on the basis of his college gradesThe bases of the building were built on the basis of a survey