upr diye gye poll m word h *teachers* means 1 se jyada teacher ki baat hori h ab jb 1 se jyada teacher ki baat hori h to hum dekhte h present m baat hori h ya past ki present k case m *are* ka use hota h and past k case m *were* ka so yhn options m *are* nhi h to hum understood h ki *were* use hoga . *is* ka use 1 teacher k liye hota h present m jb hum baat krte h example - the teacher is not available . teacher abhi available nhi h *was* ka use 1 teacher k liye hota agar past ki baat krte. example - the teacher was not available . teacher available nhi thi.