Should a comma be added between a participle phrase and a back quilt ornament?

Not added. A single participle is usually preceded by a definite clause. Like what.

china is a developing country.

Participle phrases are usually postposed, such as:

the concert given by the symphony was a great success.

The symphony orchestra held a great success.

the man standing by the window is our teacher.

The man standing by the window was our teacher.

Depending on the specific situation of the sentence, there are also cases where there is a comma, such as: the concert which was held here on Friday afternoon, given by the Berlin symphony, was a greatest success

The preceding modifier is itself followed by a clause, which is separated by a comma because it is relatively long, so as to balance the sentence.

Not added. the man knocked by a taxi was send to the hospital.

The sentence knocked by the taxi is a past participle phrase as a definite and is not used.

If you understand, please be in time, if you still don't understand, let's continue the discussion!

That is, the -ing, -ed phrase of the verb, which can be used as a definite or adverbial.

the boys tanding by the door is a student.(Among them.)

Standing by the Door is the ing phrase to modify the boys)

knowing the news,he got excited.(knowing the news phrase to do adverbials).

he came into the classroom,followed by two students.(followed by two students.is a past participle to do an adverbial)

we met a boy bitten by his father.(bitten by his father is a past participle as a definite).

There are present participles and past participles.

The addition of a phrase after a participle constitutes a participle phrase.

In sentences, adverbials, adjectives, etc. can be made.

For example, the boy called xiaoming is my best friend

called is a past participle to make a definite. Modifying boy can be translated as a boy called Xiao Ming.

Or there was a terrible noise following the sudden burst of light

These are all definite sentences.

seeing from the top of the hill, we can find that the city looks more beautiful.The logical subject is we present participle to do adverbial.

seen from the top of the hill, it looks like a dragon.

The logical subject is it past participle to do adverbials.

Special emphasis is placed on it. Notice the difference between past participle and past tense!

For non-restrictive definite clauses led by which, which can be omitted and replaced with a comma.

The two parts between the same position can be connected with a comma.

It is not a homonyus (a homonym is two words or sentences in a sentence that refer to the same thing).

A word participle phrase can be a single word or a phrase.

Things seen here are mightier than things heard

things that are seen are mightier than things that are heard.

Seen and heard are used here as adjectives to mean "to be heard, to be seen", and this type of adjective derived from participles is to be postposed.

Here seen and heard are a word, phrase form for example:

the story believed by all the children is actually not true.

The story that all the children believe is not true.

Believed by All the Children is a postpositional participle phrase that modifies a story

The participle phrase is placed after the modifier is a conventional grammar, the participle can be one word or two, the key depends on whether the verb is transitive, and the intransitive should have a preposition

Participle: Present participle, past participle.

Participle phrase: A word structure made up of participles.

It can play an auxiliary role in the sentence: adjective, adverbial, supplemental, etc.

There are present participles and past participles.

The addition of a phrase after a participle constitutes a participle phrase.

In sentences, adverbials, adjectives, etc. can be made.

For example, the boy called xiaoming is my best friend

called is a past participle to make a definite. Modifying boy can be translated as a boy called Xiao Ming.

Or there was a terrible noise following the sudden burst of light

These are all definite sentences.

seeing from the top of the hill, we can find that the city looks more beautiful.The logical subject is we present participle to do adverbial.

seen from the top of the hill, it looks like a dragon.

The logical subject is it past participle to do adverbials.

Special emphasis is placed on it. Notice the difference between past participle and past tense!

That is, the -ing, -ed phrase of the verb, (i.e., the present and past tense forms of the verb), which can be used as a definite or adverbial.

theboys

tanding

bythedoorisa

student.(Among them.)

standing

bythedoor

It is the ing phrase to make the definite modifier boys)

knowing

thenews,he

gotexcited.(knowing

thenews

phrases do adverbials).

hecame

intotheclassroom,followedbytwo

students.(followed

bytwostudents.is a past participle to do an adverbial)

wemetaboy

bitten

byhisfather.(bitten

byhisfather is a past participle to make a definite).