The sentence refers to a completed action in the past ("yesterday"). The simple past "did not come" is correct. "Has not come" is present perfect, which does not work with a specific past time like "yesterday."

For two-item comparisons, use the comparative form: "more efficient" (efficient has three syllables, so "more + adjective"). "Efficienter" is incorrect. "Most efficient" is superlative (three or more items).

Future perfect tense ("will have finished") describes an action that will be completed before another future action. The arrival is in the future; finishing dinner happens before that arrival.

Indirect questions use statement word order (subject + verb), not question order. "Where the station is" is correct. "Where is the station" is direct question word order, which is incorrect after "Could you tell me."

The adverb "clearly" modifies the verb "speaks." "Clear" is an adjective and cannot modify a verb. "Clearly" describes how she speaks.

After phrasal verbs like "look forward to," the "to" is a preposition, not part of an infinitive. Therefore, use the gerund (-ing form). "Hearing" is correct. "Hear" (infinitive) is incorrect after a preposition.

The present perfect continuous ("have been working") emphasizes the duration of an action that started in the past and continues to the present. "For 10 years" indicates duration, so the continuous form is appropriate.

The structure "so + adjective + that" expresses a result. "So boring that" means the level of boredom caused falling asleep. "Such" is used with noun phrases ("such a boring movie that").

When "not only" begins a sentence for emphasis, subject-verb inversion is required. "Did she pass" is correct. "She passed" (no inversion) is incorrect in this structure.

The adjective "responsible" is followed by the preposition "for" + gerund (or noun). "For preparing" is correct. "To prepare" (infinitive) is incorrect with "responsible."

This is an inverted third conditional (past unreal condition). "Had I known" = "If I had known." The result clause requires "would have taken." "Would take" is for present/future unreal.

After the causative verb "made" (meaning forced/compelled), use the bare infinitive (no "to"). "Work" is correct. "To work" is used after "forced" or "asked" but not after "made."