Potential form (can ~)

The Japanese ability/possibility pattern ~ことができる (and its shorter form ~られる) represents a fundamentally different way of thinking about "can" compared to English. In English, "can" is typically a modal verb that directly expresses ability as an inherent quality — "I can swim" treats the ability almost as a property you possess. Japanese, however, constructs this concept differently: ~ことができる literally means "it is possible to do [something]" — breaking the idea into two parts: the action itself + a statement that it's possible. This indirect approach reflects a more objective, situation-aware perspective rather than a claim about personal capacity.

Here's the crucial difference in thinking: English asks "Do I have the ability?" (internal focus), while Japanese asks "Is it possible for this action to occur?" (external/objective focus). Notice できる actually means "it comes together" or "it is possible" — the same word used for "it works" or "it's completed." This reveals that Japanese treats ability as a natural result or circumstance, not a trait you possess. An English speaker might say "I can speak Japanese" with confidence in their skill; a Japanese speaker saying 日本語が話せます is more literally claiming "Japanese becomes speakable (for me) in this situation" — subtly emphasizing that the action is achievable under the right conditions, not that they're inherently capable.

This also explains why the ~られる form (passive-looking) doubles as the ability form: it's actually expressing permission or potential in a more general sense. When something "is possible to be done," it exists in that realm of potentiality. English speakers struggle here because they conflate "ability," "permission," and "possibility" into one modal concept; Japanese treats them as nuanced variations on the same idea of potential (possibilities that can happen).

Understanding this shift from "I have ability" to "this action is capable of happening" is key to mastering Japanese ability expression and avoiding the stiff, non-native feeling of translating English modals directly.