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All these words (except 'how') even start from 'Wh'. These forms show 'surprise, confusion, or emphasis. Following is the list of auxiliary and modal verbs: Auxiliary Verb-- Be-- Am, Is, Are, Was, Were; Auxiliary Verb-- Do-- Do, Does, Did; Auxiliary Verb-- Have-- Have, Has, Had; Modal Verbs-- May, Might, Can, Could, Will, Would, Shall, Should, Must, Need, Used (To), Ought (To), Dare.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.