Expressions like "All I am doing lately is" should be fallowed by "listening to music" or "listen to music"?

Question

I have read the following links and have a question similar to them:

All we seem to do is argue or is arguing

“All you have to do is read” vs. “All you have to do is to read”

"What I have to do is" + verb inf

What form of verb should expressions like "All I want to do is" be followed by?

Based on these links, I suppose the sentence:

1. "All I do lately is listen to music".

is right, and the sentence:

2. All I do lately is listening to music.

is wrong.

But what about these:

3. "All I am doing now is listen to music".

4. "All I am doing now is listening to music".

Does the present continuous form of the verb ("doing") makes the phrase coming after "is" to be a gerund?

Maybe the original form of this sentence is

5. "All I am doing now is [I am] listening to music".

Where [I am] is omitted so it is reasonable that the present continuous form of the verb ("doing") propagates to the phrase after "is".

What ever the answer is, can I generalize the answer to all the following expressions?

6. What I have been doing lately is study/studying.
7. The work that I have been doing lately is draw/drawing a painting.
8. The dream that I am thinking about is go/going on a trip.

Answer 1

Yes, when the first main verb has an "ing" form, the second should also have an "ing" form¹:

4. All I am doing now is listening to music.
5. What I have been doing lately is studying.
6. The work that I have been doing lately is drawing a painting.
7. The dream that I am thinking about is going on a trip.

Note that one usually neither "draws" a painting nor "thinks" about a dream. Those sentences are certainly possible but a bit unusual.

Furthermore, there can be some ambiguity; for example, if "going" were a present participle (instead of a gerund), then we might wonder whether the dream was going on a trip for business or for pleasure. In this case it should be obvious that that is not the intended meaning, but in other sentences it could cause some confusion.

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¹You didn't ask about full infinitives, but they are sometimes possible. For example: "The idea that I'm proposing is to start a new business."