て / で
- 1Marks the cause of an emotional reaction such as surprise, happiness, or sadness.Ex. 1
- 2Marks the cause of a resulting situation or unavoidable outcome.Ex. 2
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Neutral and very common in both speech and writing. The result clause usually expresses a feeling, a state, or something outside the speaker's control, rather than a deliberate choice. Compared with から or ので, the causal link is softer and implied by the connection itself rather than stated outright.
Do not follow causal て with a command, request, invitation, or intention; use から or ので instead.
Note that the same て-form can also show simple sequence, so context determines whether it means cause.
Learners sometimes use て for reasons behind deliberate decisions, where から or ので sounds more natural.
- てからN5「て / で」expresses a reason and can attach to verbs, adjectives, and nouns, but the second clause cannot be a request or command. 「てから」only attaches to verbs and means 'first... then...' or 'ever since...', not a reason, and its second clause can be a request. They are not interchangeable.
- からN5「から」also has a separate 'starting point' usage. When expressing a reason, it explicitly marks the reason, and the second clause can contain requests, commands, or intentions — which 「て / で」cannot. 「から」attaches to the plain or polite form, with nouns and な-adjectives requiring 「だ/です」.
- のでN5「ので」explicitly marks a reason; besides results and judgments, its second clause can also take requests and suggestions, with a soft, polite tone. When the second clause is a result or emotion, the two are mostly interchangeable. Nouns and な-adjectives take 「なので」.
- ためにN3When expressing a cause, 「ために」is similar to 「て / で」but more formal, with a clearer cause-effect link; 「て / で」is softer and loosely causal, and when the second clause is an emotion it should not be replaced with 「ために」. 「ために」can also express purpose.
- せいでN3「せいで」specifically marks the cause of a bad result, with a blaming, dissatisfied tone; 「て / で」simply connects naturally and works for both good and bad outcomes. When describing a bad result, you can switch to 「せいで」(the tone becomes blaming), but 「せいで」attaches to nouns with 「の」(noun + 「の」+ 「せいで」) and to verbs in the plain form (plain form + 「せいで」).
てから means "after doing ~" and marks only time order, not cause. から and ので state a reason explicitly and can be followed by requests or intentions, ために (N3) is a more formal way to mark cause, and せいで marks a cause blamed for a bad result.
