Present Simple - (вспомогательные глаголы) do/does + окончание "S"
Two men carrieS these to the kitchen.
They askS him his name.
Present Perfect - (вспомогательные глаголы) have/has + третья форма глагола.
Two men HAVE carriED these to the kitchen.
They HAVE askED him his name.
Present Continues - (вспомогательные глаголы) is/ are + глагол с окончанием "ing".
Two men ARE carryING these to the kitchen.
They ARE askING him his name.
P.S Заглавными буквами в предложениях выделены вспомогательные глаголы и окончания глаголов.