[Grammar] have learned/began learning

[contiluo]

Are the following sentences grammatical?

1. I began learning the piano from the age of 5.
2. I have learned to play the piano since I was five years old.
3. I have learned to play the piano for at least ten years.
4. I have learned playing the piano since I was five years old.
5. I've been learning to play the piano since I was five years of age.

 

[Rover_KE]

Only #5 sounds natural to me.

 

[Tdol]

1 & 2 are grammatical too IMO. 3 has a mathematical issue.

 

[emsr2d2]

I find 1 and 2 unnatural.

1. I started/began learning [to play] the piano at the age of five.
2. I have been learning [to play] the piano since I was five years old.
3. I have been learning [to play] the piano for at least ten years.
4. I have been learning [to play] the piano since I was five years old.
5. As you can see, your sentence #5 matches my sentences #2 and #4.

I find very few alternatives to be natural. I would say only:

I started learning [to play] the piano at the age of five.
I have been having piano lessons since the age of five/for at least ten years.

 

[Raymott]

Talking the about the meaning of "grammatical" (on another thread), here we have one reply saying that only #5 is natural, and a following reply saying that #1 and #2 are grammatical too.
From teachers, this has to confuse learners about what exactly "grammatical" means.
The main point is that not all grammatical sentences are natural, and that not all unnatural sentences are ungrammatical.
If we say that a sentence is grammatical, that doesn't mean it's a good sentence to use.
Just a thought.

 

[MikeNewYork]

I agree with Tdol. 1, 2, and 5 work for me.

 

[Barb_D]

I think to say "you began learning" "from the age" is a problem. Grammatical or semantic, I don't know. The line is blurred for me here.
I began learning at the age...
I have been learning from the age ...