1. This book is worth reading.
2. It is worth to read this book.
3. This book is worth to read.
4. It is worth while to read this book.
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Which ones are grammatical? Do we have other patterns using 'worth'?
1. This book is worth reading. OK
2. It is worth it to read this book. note the correction
3. This book is worth to read. not OK
4. It is worthwhile to read this book. note the spelling correction
Out of the four options, the first and fourth sentences are grammatically correct:
1. This book is worth reading.
4. It is worthwhile to read this book.
When using the word "worth" to express value or benefit, it is typically followed by a noun or a gerund (verb + -ing form). So, the correct patterns using "worth" are:
1. Worth + noun: This book is worth the money/time/effort.
2. Worth + gerund: This book is worth reading/trying/exploring.
Other patterns using "worth" include:
1. Worthwhile + infinitive: It is worthwhile to read this book/visit that place. Note that "worthwhile" is an adjective and is commonly used with the infinitive form of a verb.
2. Worth + preposition + noun: The painting is worth millions of dollars/This car is worth the investment.
Remember that the preposition used in the pattern can vary depending on the context and the noun used.