Gerunds and Infinitives: Too and Enough + Infinitive

Too and enough are always followed by infinitives when they connect to a verb. Too + adjective + to do means "so much that you cannot": "It's too hot to go outside" (the heat prevents going). Adjective + enough + to do means "sufficiently to enable": "She's old enough to drive" (her age enables driving). Notice the word order: "too" comes before the adjective, while "enough" comes after.

These structures are common in everyday English: "The box is too heavy to lift," "He speaks clearly enough to understand," "We arrived too late to catch the train." When you add a person, use "for": "The box is too heavy for me to lift" and "She spoke slowly enough for everyone to understand." It's + adjective + to do is a related pattern: "It's impossible to finish today" and "It's nice to meet you." The infinitive always follows in these structures, never a gerund. These patterns are regularly tested in Cambridge B1 and B2 examinations.