tense markers

He walks. He will walk. for example.

Dear sir,

We may say that «s» marks the third person singular for the present tense. For example eats, drinks, sleeps.

We may also say that «ed» marks the past tense in regular verbs. For example asked, called, shouted.

Kind regards,

there is a good webpage called:

https://sites.google.com/site/englishiseasyefl/grammar/present-simple/unless/wish/active-and-passive/modals/time-expressions-for-t