To make things even more con­fus­ing, the plural of “se­ries” is also se­ries. You should there­fore use a sin­gu­lar verb if you speak about one par­tic­u­lar se­ries, e.g. “my favourite T… See more

Sim­i­larly to “se­ries”, “means” is al­ready both the sin­gu­lar and the plural form. For ex­am­ple, … See more

A “bel­lows” is an in­stru­ment used for blow­ing air. Like “se­ries”, the plural of “bel­lows” is also “bel­lows”, so you have to use a sin­gu­lar verb when speak­ing about one bel­low… See more

Measles is a dis­ease, and as you have prob­a­bly no­ticed from the pre­vi­ous sen­tence, the word is in the sin­gu­lar: Quite nat­u­rally, it is un­count­able, i.e. you can­not have “two … See more