A student, Kishanth, asked me about two of the points in the grammar criterion for band 8 writing (both task 1 and 2):
Kishanth學生問了我一個關于8分寫作的語法評分標準的問題（同時適用短作文和長作文）：

uses a wide range of structures
語法結構使用廣泛
the majority of sentences are error-free
大部分語句無誤

Here's the problem with these two points:
對以上兩點有這樣一個問題：

When you try to use a wide range of grammatical structures, you risk making more mistakes (errors). But to reduce the number of mistakes, you might have to simplify your sentences.
使用多種語法結構會面臨出更多錯的風險。但為了少出錯，可能不得不使用簡單的句子。

So what should you do?
我該怎么做？

My advice is this: Forget about the 'wide range of structures' point. If all of your focus is on using complex grammar, you'll probably do something worse than just make mistakes; you'll probably forget to answer the question properly. The people who worry most about grammar usually?neglect?task response,?coherence?and vocabulary.
我的建議是：別管“語法結構使用廣泛”。如果你把全部注意力放在使用復雜的語法上，你可能會遇到比犯錯更糟的事。你可能忘了正確回答問題。最擔心語法的人往往忽略了任務完成情況、連貫和詞匯。

For me, grammar is the least important criterion to worry about. I tell students to focus on the other 75% of the scoring system: task response, coherence and vocabulary. However, if you want my tip for improving your grammar score, I'd say that it's better to focus on reducing errors. I think examiners notice errors more than they notice grammatical range, and if you write a mix of short and long sentences, you'll probably fulfil the 'wide range of structures' requirement without realising it.
對我而言，語法是最不需要擔心的評分標準。我告訴學生，把心思放在剩下的75%評分上：任務完成情況、連貫和詞匯。然而，如果你想知道我的提高語法分數的技巧，我建議你把重點放在減少錯誤上。我認為，相比語法范圍，考官對錯誤更為在意。而且，如果你能混合運用長句和短句，你可能沒發(fā)現(xiàn)自己其實已經符合了“語法結構使用廣泛”這一標準。