synonym Comparative
確か
VS
以来
Differences Between "確か" and "以来"
Option A
確か
Meaning
certain, sure; if I remember correctly, I believe
Reading
たしか (tashika)
Syllabus Level
N4
Practical Example
彼の名前は確か田中さんです。
His name is Tanaka, I believe.
Option B
以来
Meaning
since (a certain event/time), ever since
Reading
いらい (irai)
Syllabus Level
N3
Practical Example
日本に来て以来、毎日日本語を勉強しています。
Since coming to Japan, I've been studying Japanese every day.
Which one to use?
Select the correct Japanese word for this context
Which word fits this context: "(certain, sure; if I remember correctly, I believe)"?
🎉 正解 / Correct!
使い分け解説:
- 確か: Can be an adjective (確かな: certain, reliable) or an adverb (確か: if I remember correctly, I believe). As an adverb, it expresses recollection with a slight uncertainty, often implying 'I'm fairly sure, but not 100% certain'.
- 以来: Indicates continuity from a specific past point in time or event up to the present. Often used in the pattern 'X 以来 Y' (since X, Y has continued). (過去の特定の時点や出来事から現在まで継続していることを表します。「X 以来 Y」の形でよく使われます。)
- 確か: Can be an adjective (確かな: certain, reliable) or an adverb (確か: if I remember correctly, I believe). As an adverb, it expresses recollection with a slight uncertainty, often implying 'I'm fairly sure, but not 100% certain'.
- 以来: Indicates continuity from a specific past point in time or event up to the present. Often used in the pattern 'X 以来 Y' (since X, Y has continued). (過去の特定の時点や出来事から現在まで継続していることを表します。「X 以来 Y」の形でよく使われます。)
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