Many language learners miss out the verb BE when they are speaking English. This happens even if they know how the verb BE agrees with the Subject. They very rarely do this with other verbs.
- "Yesterday I very happy because my sister came to London to see me."
- "London very large city."
- "It doesn't matter what I do, they never nice to me."
There may be many other completely different and unrelated sentences where learners may omit the verb BE too. This question isn't meant to only be about these examples.
Why do so many language learners do this?