Identify "When" as noun, verb, pronoun, adjective, adverb, preposition, conjunction, or interjection.

When Samuel was born, Hannah praised God.

When: conjunction

In the given sentence, the word "When" functions as a conjunction.

In the given sentence, the word "When" is used as a conjunction.

To identify the word type, here's what you can do:

1. Understand the different parts of speech:
- Noun: a word that represents a person, place, thing, or idea.
- Verb: a word that describes an action, occurrence, or state of being.
- Pronoun: a word that takes the place of a noun.
- Adjective: a word that describes or modifies a noun.
- Adverb: a word that describes or modifies a verb, adjective, or another adverb.
- Preposition: a word that shows a relationship between a noun (or pronoun) and another word in the sentence.
- Conjunction: a word that connects words, phrases, or clauses.
- Interjection: a word or phrase that expresses strong emotion or surprise.

2. Analyze the word's usage in the sentence:
- "When" in this sentence introduces a subordinate clause that expresses a specific time (Samuel's birth). It connects the main clause ("Hannah praised God") with the time information. Therefore, in this context, "When" is functioning as a conjunction.

Please note that word types can change depending on their usage in different sentences or contexts.