“Help do” vs. “help to do” vs. “help doing” in English

Both “help someone do something” and “help someone to do something” are acceptable. The form without “to” seems to be more common in everyday speech than the form with “to” (especially in American English), but both forms are common in formal writing:

He helped me move to London. (more common)

He helped me to move to London. (less common)

Some learners try to combine the -ing form we can find in other phrases with “help”, but this is unfortunately not correct:

He helped me (to) move to London.

He helped me moving to London.

Finally, there is one informal phrase in which we do use “help doing”, namely “cannot help doing”. If someone “cannot help doing something”, they cannot suppress the need to do it. For example:

I can't help thinking about her constantly = I must think about her constantly; I cannot stop thinking about her.

This idiom means the same as “cannot help but do”—we could also say, “I cannot help but think about her constantly.”

A few more examples of correct usage:

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10 “In the picture” / “on the picture”; “in a photo” / “on a photo” in English

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1.	Introduction
2.	“Lie in bed” or “lay in bed”
3.	“Information is” vs. “informations are” – plural or singular
4.	(An) information – is there an article?
5.	“News is” or “news are” – problematic words ending with an “s”
6.	So, thus, therefore, and hence
7.	“At school” vs. “in school”
8.	“In office” vs. “in the office” vs. “at the office”
9.	“Help do” vs. “help to do” vs. “help doing”
10.	“In the picture” vs. “on the picture”
11.	“Half five”, “half seven”, “half ten” etc. in British English
12.	“Prefer to” or “prefer over”
13.	“Arrive to” vs. “arrive in” vs. “arrive at”
14.	Each other's vs. each others'
15.	Difference between “cemetery” and “graveyard”

1.	Introduction
2.	“Lie in bed” or “lay in bed”
3.	“Information is” vs. “informations are” – plural or singular
4.	(An) information – is there an article?
5.	“News is” or “news are” – problematic words ending with an “s”
6.	So, thus, therefore, and hence
7.	“At school” vs. “in school”
8.	“In office” vs. “in the office” vs. “at the office”
9.	“Help do” vs. “help to do” vs. “help doing”
10.	“In the picture” vs. “on the picture”
11.	“Half five”, “half seven”, “half ten” etc. in British English
12.	“Prefer to” or “prefer over”
13.	“Arrive to” vs. “arrive in” vs. “arrive at”
14.	Each other's vs. each others'
15.	Difference between “cemetery” and “graveyard”

9 “Help do” vs. “help to do” vs. “help doing” in English