By Verbs, Countable or uncountable

Whether e-mail, letter, post card/postcard or whatver you are writing is countable or uncountable is of no consequence. It all depends on the verb.I'll send you a letter. = I'll send a letter to you. I'll write you a letter. (Common in AmE.) = I'll write a letter to you....

Where are/is respect and consideration?Either verb form is possible. Countability is not a consideration here. The point is whether the 2 qualities are being considered as distinct (are) or a composite (is), since they do overlap in concept.

I worked 3 hours overtime. ( The ' overtime ' here is ' adverb ' ) to mean how you work. water is uncountable noun, that's why we say 2 litres of water not 2 litres waters but waters with s means the ocean on the shore of a country. eg. A pirate ship has encroached the waters of...