How can I help vs What can I do

When to use each in English, with meaning, register, and examples.

How can I help

High-frequency chunk

What can I do

Top 2,000 (common)
Most common: How can I help
 How can I helpWhat can I do
Pronunciation🇬🇧 //haʊ kən aɪ hɛlp//🇺🇸 //haʊ kən aɪ hɛlp//🇬🇧 //wɒt kæn aɪ duː//🇺🇸 //wɑt kæn aɪ du//
MeaningA way to offer assistance or support to someone.A question asking for suggestions on actions.
ExampleWhen she looked upset, I asked, 'How can I help?'When my friend was upset, I asked, 'What can I do to help you?'
RegisterNeutralNeutral
How commonHigh-frequency chunkTop 2,000 (common)
CollocationsHow can I help you, How can I help with, How can I help today, How can I help make this better, How can I help outask what can I do, wonder what can I do, figure out what can I do
Common mistakesUsing incomplete sentences instead of the full phrase., Confusing with 'How can I assist?' which is more formal., Not adjusting tone for the situation (too casual in serious contexts).Forgetting to include 'I' when asking., Using 'what can I do' in formal requests without proper context., Confusing it with 'What should I do?' which implies advice.
Usage notesUsed in various contexts to offer help or support. Most appropriate in polite conversations. Avoid in formal writing.Used to inquire about possible actions or solutions. Suitable in both casual and formal contexts.

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How can I help
What can I do

Frequently asked questions: How can I help vs What can I do

What's the difference between How can I help and What can I do?

How can I help: A way to offer assistance or support to someone. What can I do: A question asking for suggestions on actions.

Which is more common: How can I help and What can I do?

How can I help is the most common in everyday English.

Can you show an example of each?

How can I help: When she looked upset, I asked, 'How can I help?' What can I do: When my friend was upset, I asked, 'What can I do to help you?'

Can I use How can I help and What can I do interchangeably?

Not always. How can I help and What can I do are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.