Learn Italian: Viaggiate comodamente in treno? - Do you travel comfortably by train?

The base adjective is comodo (comfortable). To make an adverb with the suffix -mente, you must first change the adjective to its feminine singular form, which is comoda. Then, you just attach -mente to the end to get comodamente (comfortably).

Why do we use the preposition in for in treno?

In Italian, the preposition in is generally used for modes of transport when talking about them in a general way, like 'by train' or 'by car'. So, you say in treno, in macchina, and in aereo without using a definite article.

Who is being asked the question in Viaggiate?

The verb viaggiate is the voi (plural 'you') form of viaggiare (to travel). This means the speaker is asking a group of people. Because the verb ending -ate makes the subject clear, the pronoun voi doesn't need to be included.

Is there a specific rule for where to put comodamente in the sentence?

Yes, adverbs of manner ending in -mente usually go directly after the verb they are describing. That is why comodamente sits right after Viaggiate.