Source: Swan. M. 2005. Practical English Usage Oxford, United Kingdom: Oxford University Press (2011).
Practical English Usage lists over a hundred common mistakes in the English language. Even very advanced students of English can make mistakes – nobody’s perfect! Swan (2005) has listed a number of them.
“No doubt the world is getting warmer.” = There is no doubt that the world is getting warmer.
(377) No doubt means ‘probably’ or ‘I suppose’, not ‘certainly’. To say something is certain, we can use there is doubt that (formal), without any doubt (formal), certainly, definitely.
“I can’t think of anybody whom to invite.” = I can’t think of anybody to invite.
(498.13) When a noun or pronoun is the object of a following infinitive, a relative pronoun is not normally used.
“My father, whom we hope will be out of hospital soon, …” = My father, who we hope will be out of hospital soon, …
(498.15) It is often possible to combine relative clauses with indirect statements and similar structures, e.g. I know/said/feel/hope/wish (that) …, especially in an informal style. In this structure, people sometimes use whom as a subject pronoun. This is not generally considered correct.
“Would you follow me wherever I would go?” = Would you follow me wherever I went?
(580.6) Would, like will, is avoided in subordinate clauses; instead, we generally use past verbs.
“We all have to live in the society.” = We all have to live in society.
(68.1) We do not use the with uncountable or plural nouns to talk about things in general – to talk about all books, all people or all life for example. Instead, we use no article.
See other: Notes On English Grammar