The Japanese grammar patterns "~てからでないと" and "~てからでなければ" are used to express conditions or prerequisites, often indicating that something cannot happen until a certain action is completed. Below are the explanations and formulas for combining these patterns with nouns, adjectives, and verbs.

1. ~てからでないと (~te kara de nai to)

Meaning:

This pattern is used to express that if an action isn't done first, then another action cannot happen. It often translates to "unless ~" or "if not ~ first" in English.

Formula:

• Verb (て form) + からでないと

Example Sentences:

• Verb:
  • 食べてからでないと、薬を飲めません。(Tabete kara de nai to, kusuri o nomemasen.)
    • Unless I eat first, I can't take the medicine.
• Adjective (い-adjective):
  • This pattern is typically used with verbs. If you need to use an adjective, it would usually be in the form of a verb (e.g., する, なる).
• Noun:
  • With nouns, you would typically use a verb related to the noun, e.g., completing an action related to the noun first.

2. ~てからでなければ (~te kara de nakereba)

Meaning:

This pattern is similar to "~てからでないと" but is slightly more formal or emphasizes that the following action is absolutely impossible without completing the first action. It translates to "unless" or "if not ~ first."

Formula:

• Verb (て form) + からでなければ

Example Sentences:

• Verb:
  • 宿題をしてからでなければ、テレビを見てはいけません。(Shukudai o shite kara de nakereba, terebi o mite wa ikemasen.)
    • Unless you finish your homework, you can't watch TV.
• Adjective (い-adjective):
  • Similar to the previous pattern, this is typically used with verbs.
• Noun:
  • You would use a verb related to the noun to create a sentence, focusing on the action associated with the noun.

Summary: