Your sentence
être+en+train+de
Words in this sentence
être
to be; to be located; to be situated; to denote time, day, or date; used to form compound tenses and structures, such as the perfect and pluperfect; certain intransitive verbs that indicate movement or a change of state (see the full list); all reflexive verbs; the passive voice
Verb
en
in (used to indicate space, also see usage notes); to (indicates direction towards certain very large locations, see usage notes); by (used to indicate means); as; at (used to describe an ability); of, made of (used to describe composition); in (during the following time (used for months and years)); while; by, in (describing a way of getting something); in (used to describe color); …
Preposition
de
from (used to indicate origin); of (indicates possession, association or relationship); of (used to indicate cause); of (indicates an amount); used attributively, often translated into English as a compound word; from (used to indicate the start of a time or range); by (an amount); introduces the indirect object of some verbs; variously translated in English; used before infinitive phrases; often corresponding to an English to-infinitive or gerund; after certain verbs; …
Preposition