1
〜前に
before ...
V(辞書形)／Nの + 前に
Indicates that something happens before an action or event.
- 寝る前に歯を磨きます。I brush my teeth before sleeping.
Ordering two events, and how tightly they are linked
Each one below is our full write-up of that form, in the order worth reading them. Nothing is summarised — you are looking at the same pages the grammar index links to, put next to each other.
before ...
V(辞書形)／Nの + 前に
Indicates that something happens before an action or event.
after ...
V(た形)／Nの + あとで
Indicates that something happens after an action or event.
after doing ...
V1(て形) + から、V2
Indicates that V2 happens after V1 is completed, with a sense of sequence.
before ~ing / after ~ing
V-plain + 前に · V-た + 後で · N + の + 前に・後で
The tense is fixed by the pattern, not by when it happened: 前に always takes the *dictionary* form, 後で always takes the *past* form. 寝る前に and 食べた後で, even about yesterday.
That fixed pairing is exactly what the exam checks.