'Whether' and 'If' ‘Whether’ and ‘if’ are words that connect one part of a sentence to another. We use ‘whether’ when we are choosing between two options. ‘Dom isn’t sure whether he should invite Sally to the zoo.’ In this example, Dom has two choices; to invite Sally, or to not invite her. 'I asked Sally whether she wanted to go to the zoo or the movies.' Here, Sally has two choices; to go to the zoo, or to the movies. ‘If’ describes a possibility. ‘James will go to the beach if it is sunny today.’ This example talks about the possibility of sunny weather. ‘If James has his way, white ties will be banned.’ This example talks about possibility of James getting what he wants.