7. Idioms
Idioms are a type of expression in which the meaning of that expression cannot be easily known from the meaning of its individual words. Phrases such as ‘burning the midnight oil’ or ‘it’s raining cats and dogs’, for example, which respectively mean ‘staying up late to work’ and ‘raining heavily’, are idiomatic in nature and should not be used in academic writing. The reason for this is that such phrases may be colloquial (local) in nature, vague in meaning, or fail to provide the level of accuracy that other more precise expressions could offer.
8. Incorrect Conjunctions
While it’s especially important for academics to use coordinating and subordinating conjunctions such as ‘and’ and ‘while’ or conjunctive adverbs such as ‘however’ and ‘therefore’ to improve cohesion, it’s critical that these conjunctions are used accurately every time. Thankfully, there are three simple rules that can be followed in order to assure this:
i) avoid overusing conjunctions within an essay or repeating the same conjunctions
ii) make sure that you fully understand the meaning and grammar of the conjunctions you decide to use, and then try to use those conjunctions accurately
iii) avoid beginning a sentence with a coordinating conjunction, such as ‘And it was found that…’ or ‘But there was a problem…’, as this is not academic
9. Personal Pronouns
While it’s debatable whether or not personal pronouns such as ‘I’ or ‘he’ are acceptable in academic writing as a form of academic language (you may see them sometimes being used), the general advice is that they should be avoided. As can be seen in the examples below, the use of such pronouns has a tendency to make a piece of writing more subjective and informal, and therefore less academic