The sentences that need in-text references are:
-
It is clear, therefore, that vocabulary development is an essential component for developing fluency in academic language.
- This statement presents a claim that is likely based on research or existing literature and should be supported by a source.
-
In order to know how to structure sentences in English, you require a basic knowledge of grammar.
- This sentence makes a general statement about language learning principles that could be supported by educational research or grammar resources.
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A new international study shows almost 80% of South African pupils do not develop basic reading skills by the time they reach Grade 5.
- This statement references data from a specific study, which needs to be cited to provide a source for the information presented.
The sentence that does not need an in-text reference is:
- Hyland points out that texts that share the same purpose often share the same structure.
- This sentence appears to already attribute the idea to Hyland, which indicates that it would be cited as per proper academic practice.
So, the sentences that need in-text references are the first, second, and fourth ones.