Maybe, my country doesn’t have a castle. Instead, my country has palaces! They are very grand. 1. It's the same as yesterday. -> Is the reason you use 'the' before 'same' because 'same' is used as a noun in this sentence? -> Can subject + verb be followed by the conjunction ‘because’ without complement or object? 2. What do armor and metal suits mean? -> Is 'armor and metal suits' plural because they're connected to ‘and’? 3. an hour = one hour a month = one month -> Right? 4. Is it possible to have ‘do’ in the verb part in the 'Do/Does/Did + Subject + Verb' structure? ex) Do you do the homework?, Does she do ~?, Did they do ~?

Hi, Minju! Thank you for the questions, as always. I hope these explanations help. We can talk more about them in the class. See you!

--Teacher Anji

1. It's the same as yesterday.
Is the reason you use 'the' before 'same' because 'same' is used as a noun in this sentence?

>> "Same" in this sentence is used as an adjective because it describes your day that is identical to yesterday. 

Can subject + verb be followed by the conjunction ‘because’ without complement or object?

>>No, it is not. (example: She smiled because = not a complete thought)

>> But if you mean start a sentence with because, then it is possible but it should contain a complete thought

example: Because she likes cakes, she finished all of it.

example: Because it is raining. ( This is only used in informal speech, particularly if you are talking to somebody and it's part of the conversation)
2. What do armor and metal suits mean?
Is 'armor and metal suits' plural because they're connected to ‘and’?

>> Armor and metal suits are different. Armor is a more general term for protective gear. 

> Metal suit is a specific kind of protective gear. 

> The sentence is plural because there are two items (armor, metal suits) connected together. 

> Metal suits also take plural because 'suits' means more than one suit. 

Summary:

Armor and metal suits are important. = plural

Armor and metal suit are important. = plural

Metal suits are important. = plural

A metal suit is important. = singular

An armor is important. = singular

3. an hour = one hour
a month = one month
>> CORRECT

4. Is it possible to have ‘do’ in the verb part in the 'Do/Does/Did + Subject + Verb' structure?
ex) Do you do the homework?, Does she do ~?, Did they do ~?

>> Yes. 

> Present tense:

example: Do you do your homework every day?/ Does she do her house chores well?

> Past tense: Did you do your homework yesterday? / Did she do her house chores last night?