What two types of grammatical errors is a nonnative speaker English likely to make?

It's impossible to definitively say which two grammatical errors a non-native speaker is *most* likely to make, as it depends heavily on their native language, level of English proficiency, and the specific context of their speech or writing. However, two common errors that frequently occur are:

1. Verb conjugation: This includes errors in using the correct tense (present, past, future), agreement between subject and verb, and irregular verb forms. For example, a learner might say "I goed to the store" instead of "I went to the store." This is because different languages have different systems of verb conjugation.

2. Article usage: English uses definite articles (the) and indefinite articles (a/an) in ways that can be confusing for learners. For example, a non-native speaker might say "I went to the store" when they actually meant "I went to a store." This is because article usage can differ significantly between languages.

It's important to remember that:

* Every language learner is different. Some learners may excel in certain areas of grammar while struggling with others.

* The more exposure a learner has to English, the fewer grammatical errors they will likely make.

Instead of focusing on "most likely errors," it's more beneficial to help non-native speakers develop their overall grammatical understanding through various resources, practice, and positive feedback.