How can i vs What should i do

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

How can i

InformalHigh-frequency chunk

What should i do

Top 2,000 (common)
Most formal: What should i doMost common: How can i
 How can iWhat should i do
Pronunciation🇬🇧 //haʊ kæn aɪ//🇺🇸 //haʊ kæn aɪ//🇬🇧 //wɒt ʃəd aɪ du//🇺🇸 //wɑt ʃʊd aɪ du//
MeaningA way to ask for help or advice.A way to ask for advice or help on what actions to take.
ExampleHow can I improve my English skills?I faced a difficult decision and asked myself, 'What should I do?'
RegisterInformalNeutral
How commonHigh-frequency chunkTop 2,000 (common)
Collocationshow can I help, how can I contact, how can I understandask what to do, tell me what to do, decide what to do, wonder what to do, advise what to do
Common mistakes'How can I to go?' instead of 'How can I go?', 'How can I can help?' instead of 'How can I help?'Omitting 'I' in the question, e.g., 'What should do?', Using incorrect verb forms, e.g., 'What should I did?', Not clarifying the context, making it vague.
Usage notesUse 'how can I' when seeking advice or guidance. It's informal and suits conversations rather than formal writing.Use this question when you're uncertain about what actions to take. It's appropriate in informal and formal situations but may sound too indirect in high-stakes contexts.

See it in real clips

How can i
What should i do

Frequently asked questions: How can i vs What should i do

What's the difference between How can i and What should i do?

How can i: A way to ask for help or advice. What should i do: A way to ask for advice or help on what actions to take.

Which is more formal: How can i and What should i do?

What should i do is the most formal of these.

Which is more common: How can i and What should i do?

How can i is the most common in everyday English.

Can you show an example of each?

How can i: How can I improve my English skills? What should i do: I faced a difficult decision and asked myself, 'What should I do?'

Can I use How can i and What should i do interchangeably?

Not always. How can i and What should 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.

Related comparisons