Time sequence expressions

Time sequence expressions まえに・てから

「〜まえに」(まえに, before ~) indicates that one action happens earlier than another action. This pattern is attached after 動詞(どうし, verb) in the 辞書形(じしょけい, dictionary form), for example 寝る前に(ねるまえに, before sleeping) or 食べる前に(たべるまえに, before eating). Example: 「朝ごはんを食べる前に、新聞を読みます」 (I read the newspaper before eating breakfast).

Forms other than the dictionary form are not used directly before まえに. Therefore 「食べないまえに」 (negative form), 「食べたまえに」 (past form), and 「食べてまえに」 (て form) are not acceptable. For nouns, the pattern 「名詞＋の＋まえに」 is used, for example 「食事のまえに」(しょくじのまえに, before a meal).

「〜てから」(てから, after ~) indicates that the first action is completed first, and then the second action begins. This pattern is formed from 動詞て形(どうしてけい, te-form) plus 「から」, for example 食べてから(たべてから, after eating) or 起きてから(おきてから, after waking up). Example: 「シャワーをあびてから、ねます」 (after taking a shower, I sleep).

The て form with 「から」 expresses sequence, whereas 「〜るから」 or 「〜ますから」 means 'because', so the meanings differ. The forms 「〜しに」 (purpose), 「〜しない」 (negative), and 「〜しました」 (past) do not form this sequence pattern, whereas 「してから」 is exactly right for expressing 'after doing something'.

「〜あとで」(あとで, afterward) also indicates a subsequent sequence, but it is attached after the た form (た形, past form) or 「名詞＋の＋あと」. Example: 「食べたあとで、散歩します」 (after eating, I go for a walk). The て form is not used with あと, so 「食べてあと」 is wrong. When standing alone, あとで means 'later', for example 「あとで電話します」, so it must not be confused with the sequence pattern. The choice あとで in multiple-choice questions often serves as a distractor because its meaning is the opposite of まえに.

In sentence-ordering questions, 「まえに」 directly follows the dictionary form of a verb, while the main predicate is placed at the end of the sentence. For example 「散歩する」 + 「前に」 + 「水をのみます」 (I drink water before going for a walk). In 「〜てから」, the て form is placed right before 「から」, followed by the second action behind it, such as 「手紙を書いてから、出します」 (after writing a letter, I send it).

「〜ながら」(ながら, while) indicates two actions occurring at the same time, not a sequence. Example: 「音楽をききながら、本をよみます」 (I read a book while listening to music).

「〜あいだに」 (あいだに, during/while) and 「〜あいだ」 indicate a span of time that coincides with another event, for example 「寝ているあいだに、雨がふりました」 (it rained while I was sleeping). 「〜ときに」 (ときに, when) indicates the moment at which simultaneous events occur, not a sequence before or after. 「〜ために」 (ために, in order to) indicates purpose, not time sequence.