[#DuolingoForumGems originally posted on 2021-01-16 on the Duolingo Hungarian for English speakers forum by peter.kristof.hu ]
Lenni vagy nem lenni
The verb van has many meanings and is used in several ways. Its infinitive form is lenni. It roughly corresponds to the verbs "to be" and "to have". As an intransitive verb, it cannot have an object. To understand the use of van, we need to know the types of predicates in the Hungarian sentences.
Simple predicate. It usually consists of one verb (but it can be more complex).
For example:
A vonat gyorsan halad. -- The train is moving fast.Complex predicate (nominal - verb). It consists of a nominal (noun, adjective, numeral, pronoun) and the conjugated lenni. It is the case when the verb van/vannak is used as an auxiliary verb, i.e. a linking verb or copula. Van/vannak is to be omitted in some cases. In these cases, it is sometimes called a nominal predicate because there is no verb.
An example of the complex predicate:
Te (egy) tanuló vagy. -- You are a student. You will see that the English and Hungarian approaches are slightly different.
Next, let's look at the common meanings of lenni. (Predicates are marked in bold.)