Yes, the subject of the sentence "please be gentle" is understood to be "you" or the person being addressed.
Yes, the sentence "his hand is filthy" is grammatically correct.
"Don't touch that package" has a subject and a verb. It's a complete sentence that makes sense. You could even shorten it to "Don't touch" and it would still be a sentence because the subject ("you") is understood.
Noun: I stretched out my hand to greet him. Verb: Please hand me the book on the table.
Please do your homework regularly is an imperative sentence and has no subject but the subject (you) is implied. So to make a passive sentence from an imperative sentence you can use the subject - you. You have been told to do your homework regularly. or you could say: Let your homework be done regularly.
"Please hand me the pliers" is a sentence in itself. -You said it perfectly.
Yes, the subject of the sentence "please be gentle" is understood to be "you" or the person being addressed.
The subject in this sentence is not stated it is implied. It is you.(Can) you get more popcorn please?
Please restate your question with some currency to the subject at hand. How much currency you have on hand may be difference between life and death.
subjectThe sentence is about the subject.
A sentence using the word subject: My favorite subject in school was Science.
Will you hand me the clapboard, please?
Please hand me that currycomb.
This is an imperative sentence and the subject is implied (not stated). In imperative sentence the implied subject is 'you'.
no there is subject
In this sentence, the subject is the unspoken (or understood) "you," as in "[You,] please put food and water .... "
This sentence is a command/request and doesn't have a subject. The subject - you - is implied