One rule of thumb for English, however, is that an indirect object is not present unless a direct object is also present. A prepositional object is one that is introduced by a preposition. Despite the difficulties with the traditional nomenclature, the terms direct object and indirect object are widespread.
https://en.wikipedia.org/wiki/Indirect_object
Object (grammar) Traditional grammar defines the object in a sentence as the entity that is acted upon by the subject. There is thus a primary distinction between subjects and objects that is understood in terms of the action expressed by the verb, e.g. Tom studies grammar - Tom is the subject and grammar is the object.
https://en.wikipedia.org/wiki/Indirect_object
What Is a Direct Object? (with Examples) The direct object of a verb is the thing being acted upon (i.e., the receiver of the action). Examples of Direct Objects Here are some examples of direct objects (shaded): Play the guitar. Every actor played his part. The crowd will cheer the President. We can climb the hill and fly the kite.
http://www.grammar-monster.com/glossary/direct_object.htm
The indirect object is very similar to the object of the preposition. They can mean the same thing. If the preposition is missing, the word is an indirect object. If the preposition is there, the word is the object of the preposition.
https://www.englishgrammar101.com/module-4/sentence-parts/lesson-8/indirect-objects
In Latin and related languages, direct objects are usually marked with the accusative case, and indirect objects with the dative case. Note as well that some objects are marked in telling ways in particular languages. In Spanish, for example, human objects have to be marked by the preposition a; the phenomenon is called differential object marking.
https://en.wikipedia.org/wiki/Indirect_object
Phrases and Clauses Can Be Direct Objects. 1  She thought that the contract had ended. 2  The constable described what he saw at the scene. 3  Toby loves cooking scones. 4  The cat wants to eat our goldfish.
http://www.grammar-monster.com/glossary/direct_object.htm
The indirect object is a noun that receives the action of the verb, but the action is indirect because it affects the direct object first. Not all sentences that have a direct object also have an indirect object. All sentences with an indirect object must have a direct object. I threw Jonas the ball.
https://www.englishgrammar101.com/module-4/sentence-parts/lesson-8/indirect-objects
The direct object of a verb is the thing being acted upon (i.e., the receiver of the action). Examples of Direct Objects Here are some examples of direct objects (shaded): 1  Play the guitar. 2  Every actor played his part. 3  The crowd will cheer the President. 4  We can climb the hill and fly the kite.
http://www.grammar-monster.com/glossary/direct_object.htm
Traditional grammar defines the object in a sentence as the entity that is acted upon by the subject.[1] There is thus a primary distinction between subjects and objects that is understood in terms of the action expressed by the verb, e.g. Tom studies grammar - Tom is the subject and grammar is the object.
https://en.wikipedia.org/wiki/Indirect_object
Traditional grammar defines the object in a sentence as the entity that is acted upon by the subject. There is thus a primary distinction between subjects and objects that is understood in terms of the action expressed by the verb, e.g. Tom studies grammar—Tom is the subject and grammar is the object.
https://en.wikipedia.org/wiki/Indirect_object
what are indirect objects
The indirect object is a noun that receives the action of the verb, but the action is indirect because it affects the direct object first.