Looking on the internet deeply has found these results:

How i can do it? is the most popular phrase on the web.

how can I do it? 128,200,000 results on the web	How i can do it? 130,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I know how you feel, but how can I do it? How can I do that? I told you. And for decades, I'm going, why does this happen? What can I do about it? How can I change this? I mean there must be something. How can I do something if I don't try to do it? But how can I disprove a false accusation when I don't have any understanding of it? How can I do flamboyant driving in this? How can I do it without looking? How else can I do it more properly?	My body's how I make my living, isn't it? You want to know how I see it? This is about how I mistreated you, isn't it? How can I do it without looking? You know how I've been reluctant to talk about it? Yes. I know how you feel, but how can I do it? How else can I do it more properly?

how can I do it?

128,200,000 results on the web

How i can do it?

130,000,000 results on the web

More popular!

I know how you feel, but how can I do it?
How can I do that? I told you.
And for decades, I'm going, why does this happen? What can I do about it? How can I change this? I mean there must be something.
How can I do something if I don't try to do it?
But how can I disprove a false accusation when I don't have any understanding of it?
How can I do flamboyant driving in this?
How can I do it without looking?
How else can I do it more properly?