Sentence Synthesis Using Infinitives for Class 11 and 12 (UP and CBSE Boards)

For Class 11 and 12 students preparing for UP Board and CBSE Board exams, mastering sentence synthesis using infinitives is essential for scoring high in English grammar. This guide covers infinitives for UP Board and CBSE Class 11 and 12, with clear rules, examples, and exercises to help you excel in board exams. Download our free Infinitives Guide PDF below to practice anytime!

What are Infinitives and How to Use Them in Sentence Synthesis?

An infinitive is the base form of a verb, usually preceded by to (e.g., to write, to play). In sentence synthesis for Class 11 and 12, infinitives combine sentences to show purpose, result, or consequence, making your answers concise and effective for UP and CBSE Board English exams.

Rule 1: To Show Purpose

Structure: [Action] + to + [base verb] + [object]
When to Use: When the second sentence explains the goal of the first sentence in Class 11 and 12 English grammar.
Examples:
He went to Delhi. He wanted to meet his friend.
👉 He went to Delhi to meet his friend.
She studies hard. She wants to score well.
👉 She studies hard to score well.
We left early. We wanted to catch the bus.
👉 We left early to catch the bus.
They went to the market. They wanted to buy books.
👉 They went to the market to buy books.

Rule 2: "Too...to" (Negative Result)

Structure: too + adjective/adverb + to + base verb
When to Use: When the first sentence shows an inability or impossibility in the second sentence for sentence synthesis for Class 12.
Examples:
The bag is heavy. The child cannot carry it.
👉 The bag is too heavy for the child to carry.
She is tired. She cannot study now.
👉 She is too tired to study now.
The hill is steep. We cannot climb it.
👉 The hill is too steep to climb.
The book is boring. I cannot read it.
👉 The book is too boring to read.

Rule 3: "Enough...to" (Positive Result)

Structure: adjective/adverb + enough + to + base verb
When to Use: When the first sentence expresses a quality sufficient for the action in the second sentence in CBSE Class 11 and 12 grammar.
Examples:
She is intelligent. She can solve this puzzle.
👉 She is intelligent enough to solve this puzzle.
He is strong. He can lift the box.
👉 He is strong enough to lift the box.
The tea is cool. We can drink it now.
👉 The tea is cool enough to drink now.
The child is tall. He can reach the shelf.
👉 The child is tall enough to reach the shelf.

Practice Exercise for Class 11 and 12

Practice these sentence synthesis rules for Class 12 to ace your UP and CBSE board exams! Combine each pair of sentences into one simple sentence using an infinitive.

• He went to the market. He wanted to buy vegetables.
• She is very tired. She cannot work now.
• This pen is costly. I cannot buy it.
• She is rich. She can help the poor.
• We eat food. We may live.
• He worked hard. He might pass the examination.
• The boy is very clever. He can solve the problem.
• She is too young. She cannot drive a car.
• The tea is cool. We can drink it now.
• He has a lot of work. He must complete it today.

Share your answers in the comments below and get feedback to improve your CBSE Class 11 and 12 English grammar skills!

Answer Key

• He went to the market to buy vegetables.
• She is too tired to work now.
• This pen is too costly for me to buy.
• She is rich enough to help the poor.
• We eat food to live.
• He worked hard to pass the examination.
• The boy is clever enough to solve the problem.
• She is too young to drive a car.
• The tea is cool enough to drink now.
• He has a lot of work to complete today.

FAQs on Infinitives for Class 11 and 12

What are infinitives in English grammar?
Infinitives are verb forms with “to” (e.g., to write) used in sentence synthesis for Class 11 and 12 to show purpose, result, or consequence.

How do infinitives help in CBSE board exams?
Infinitives help you write concise, clear answers, improving your score in CBSE Class 11 and 12 English grammar sections.

Where can I download an infinitives guide for UP Board?
Download our free Infinitives Guide PDF below for UP and CBSE Board preparation.

Tips for Board Exam Success

Infinitives are a key part of the Class 11 and 12 English syllabus for UP and CBSE Boards. Practice these sentence synthesis rules for Class 12 to write impressive, concise answers in your exams. Explore more grammar lessons at English Rath or check our guide on Nominative Absolute for additional tips!