My favorite musical band¶
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My favorite band

"Musical" is the adjective form for the word "music".

"My favorite band" is also acceptable and more common, because the word band often implies music.

My favorite band musical band is The Beatles.¶
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My favorite band is tThe Beatles.

It is the same explanation as what I explained for the title. The band's name was officially The Beatles, which is a proper noun.

I guess everybody knows them around the world, as they weare and still are famous.

There is nothing grammatically wrong with the sentence, but it does sound a bit awkward. If something is famous before and still famous now, then it is still famous.

The name of the band is a pun between the insects beetle and the musical term beat --> Beatles

Since one type of insect is mentioned, we do not need an "s" ending.

The band is comporised of Paul McCartney, John Lennon, George Harrison and Ringo Star.

The word choice would be comprised, which means made up of. Since the band is no longer together, we use the simple past tense.

They have recorded 8 (I think) albums in about 7 years.

Again, the band is no longer together, so we use the simple past. If we say "they have recorded 8 albums in about 7 years", it is the past perfect and implies that the band recorded those albums in the past and are still recording music together.

During the beginning of 60's, they were seen as a "boys band", meaning it was just a commercial band that teenage girls liked.

"boy band" is the term. Teenage is the adjective form of teen.

But rapidly, with the albums Revolver or Sgt. Pepper, The Beatles became an "avant gardist-garde band. ¶
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During the beginning of 60's, they were seen as a "boy band", meaning it was just a commercial band that teenage girls liked, but rapidly with the albums Revolver and Sgt. Pepper's, The Beatles became an "avant-garde" band.

You can start a sentence with "and" or "but" or you can join the previous sentence with this sentence, since the ideas are related.

"but" is a coordinating conjunction that can be used to join two clauses of equal importance. Please refer to the rules regarding FANBOYS (for, and, nor, but, or, yet, so).

We use the word "and" for Revolver and Sgt. Pepper's, because they were two separate albums that you are referring to.

Avant-garde is the correct spelling, meaning new or unusual ideas.

Each album was different ofrom the precedenting one, and it was a new kind of music, with new ideas.

"different from" is a phrase that is used to compare things. These two words often go together. "preceding one" is another phrase meaning the one before.

I like how you correctly used the coordinating conjunction "and" to connect the two clauses together with relating information. Great job!

"a new kind of music". We use "a" because we are talking about music in general.

A lot of people think that the Beatles invented, or helped to make popular, the hHard rRock or pPsychedelic rRock, for instance.

In general a comma in front of "or" is not needed. "the" is not needed for hard rock, because hard rock is a general term for the genre like Jazz or Classical or Blues, etc. It is not specific.

The band broke up in 1970, 50 years ago, and. I think The Beatles are a great source of inspiration for a lot of musicians, even today. ¶
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Although the band broke up in 1970, 50 years ago, I think The Beatles are a great source of inspiration for a lot of musicians, stilleven today.

In this case we cannot link the two clauses with "and"because the next clause "I think the Beatles are a great source of inspiration for a lot of musicians, still today" does not connect with the band breaking up more than 50 years ago.

You can possibly make the sentence into one sentence using the word "although" as I showed in the second example. The reason is "although" is a subordinating conjunction where the information from the second clause depends on the information from the first clause.

My favorite music band

No need to write music here; people would normally understand from context.

I guess everybody knows them around the world, knows them as they were and still are famous.

The name of the band is a pun betweenon the insects beetle and the musical term beat --> Beatles

But rapidly, with, as a result of the albums Revolver or Sgt Pepper, The Beatles became known an "avant gardiste" band.

Each album was different ofrom the precedentlast and it was a new kind of music, with new ideas.

A lot of people think that the Beatles invented, or helped to make popular, the hard rock or psychedelic rock, for instance.

The band broke up in 1970, which was 50 years ago, and I think The Beatles are still a great source of inspiration for a lot of musicians, still today.

My favorite band music is the Beatles.

Or: "My favorite music is that of the Beatles."

I guess everybody knows them around the world knows them, as they were and still are famous.

The name of the band is a pun between the species of insects, the beetle, and the musical term beat --> Beatles

The band iwas composed of Paul McCartney, John Lennon, George Harrison and Ringo Star.

Some of the members are now dead, so in this particular context, the past tense is necessary. The present tense could be acceptable in certain styles of historical writing though.

They have recorded 8eight (I think) albums in about 7seven years.

The exact rule for which numbers to write out is in dispute, but generally ones below ten are written out, unless you want to emphasize the number (like in a math problem).

The present perfect describes actions or results of actions that continue to the present, but since that span of seven years is up, and since the band has dissolved, it doesn't work here.

During the beginning of 60's, they were seen as a "boys band", meaning it wasthat they were just a commercial band that teen girls liked.

But rapidly, with the albums Revolver orand Sgt Pepper, The Beatles became an "avant gardiste" band.

Each album was different ofrom the precedent and it waslast one and they would have new kinds of music, with new ideas.

Similar to "précédent" and "précéder," "precedent" comes from "precede," but unlike "précédent," it refers to a standard that has been set, not literally what has preceded something.

A lot of people think that the Beatles invented, or helped to make popular, the hard rock or psychedelic rock, for instance.

The band broke up in 1970, 50 years ago, and I think The Beatles are still a great source of inspiration for a lot of musicians, still today.

My favorite band music is tThe Beatles.

You could either say, "music group" or "band"

I guess everybody knows them around the world knows them, as they were, and still are, famous.

I'm not sure of the rule, but this word order sounds more natural.

They have recorded 8 (I think) albums in about 7 years.

'They had' implies that they recorded albums until the present moment.

During the beginning of 60's, they were seen as a "boys band", meaning it was just a commercial band that teen girls liked.

Each album was different ofrom the precedentvious, and it was new kind of music, with new ideas.

A lot of people think that tThe Beatles invented, or helped to make popular, the hard rock or psychedelic rock, for instance.

With this sentence, my English mind is expecting more information about whether the people's ideas of the Beatles are true or false.

Another way to say this could be...

"A lot of people credit The Beatles with inventing, or helping...."

The band broke up in 1970, 50 years ago, and. I think The Beatles are still a great source of inspiration for a lot of musicians, still today.

Again, I have no idea of the grammar, but the word order sounds better in my mind.