Another part of grammar that gives non-native speakers trouble is countable and uncountable nouns. English would be straightforward if every noun could be pluralized by simply adding an -s or -es at the end, but unfortunately, English is not that simple.

There are three tenses: past, present, and future. But it gets a bit complicated with tenses like past perfect, present perfect infinitives, future perfect, and more.

The importance of capitalization is often overlooked by non-native speakers. These are the main places capitalization errors happen: titles, proper nouns and common nouns, the beginning of a sentences and comma splices

Mistakes with prepositions are up there as one of the most common errors non-native English speakers make. Similar to articles, these English learners will either use the wrong preposition, omit a needed preposition, or put a preposition where it’s not needed.

The top mistake of non-native speakers of English is with articles (a, an, and the). English learners tend to either use the wrong article, omit a needed article, or put an article where it’s not needed.

Our Pcanpi team collected the 20 most common English mistakes made by non-native speakers to help international English learners identify and solve these errors.