Corrected grammatical errors

Corrected some small grammatical errors

docs/en/Application-Services.md

@@ -430,7 +430,7 @@ Task DeleteAsync(TKey id);
 
 #### Querying
 
-These methods are low level methods those can be control how to query entities from the database.
+These methods are low level methods that can control how to query entities from the database.
 
 * `CreateFilteredQuery` can be overridden to create an `IQueryable<TEntity>` that is filtered by the given input. If your `TGetListInput` class contains any filter, it is proper to override this method and filter the query. It returns the (unfiltered) repository (which is already `IQueryable<TEntity>`) by default.
 * `ApplyPaging` is used to make paging on the query. If your `TGetListInput` already implements `IPagedResultRequest`, you don't need to override this since the ABP Framework automatically understands it and performs the paging.
@@ -440,7 +440,7 @@ These methods are low level methods those can be control how to query entities f
 
 #### Object to Object Mapping
 
-These methods are used to convert Entities to DTOs and vice verse. They uses the [IObjectMapper](Object-To-Object-Mapping.md) by default.
+These methods are used to convert Entities to DTOs and vice verse. They use the [IObjectMapper](Object-To-Object-Mapping.md) by default.
 
 * `MapToGetOutputDtoAsync` is used to map the entity to the DTO returned from the `GetAsync`, `CreateAsync` and `UpdateAsync` methods. Alternatively, you can override the `MapToGetOutputDto` if you don't need to perform any async operation.
 * `MapToGetListOutputDtosAsync` is used to map a list of entities to a list of DTOs returned from the `GetListAsync` method. It uses the `MapToGetListOutputDtoAsync` to map each entity in the list. You can override one of them based on your case. Alternatively, you can override the `MapToGetListOutputDto` if you don't need to perform any async operation.