grammar - When is "someone" singular and when is it plural ...
ell.stackexchange.com › questions › 1944503. This answer is not useful. Show activity on this post. ‘Someone’ like ‘anyone’, ‘everyone’ and ‘no one’ are a group of what’s known as indefinite pronouns and are always singular and require singular verbs. This is why “Someone cleans the house” is a correct and natural sounding sentence. However, there is this idiomatic construction: to have + someone+ do something (infinitive without to) which means 'to get somebody to do something'.