托福口语考试常见错误举例：

My teacher gave interesting assignments andmotivating the students.托福考试试题

很显然，这个托福考试口语错误属于混用语法结构的一个典型。这会使句子产生歧义：难道是说My teacher gave interestingandmotivating assignments to the students? 因为本句中interesting和motivating 是平行结构.或者是My teachergave interesting assignments and motivated thestudents?因为亦可以理解成gave和 motivated是平行结构.所以错误使用语法会带来许多意想不到的麻烦。

当我们重复使用一个短语或单词的时候，不仅会给人以词汇量过小的感觉，有时甚至也会造成误解，这对于托福口语分数是很有影响的。我们来看一个例子：

My teacher wrote the assignment on the chalkboard. The assignment was onthechalkboard until the teacher erased the assignment after we had all done theassignment.事实上这句话的观点会更加清晰，如果我们将重复的词替换为其他表达的话。我们再来看看改进后的表达：

My teacher wrote the assignment on the chalkboard. She erased the boardafter we had allcompleted the task.

其中 assignment 被替换为 task; teacher 变为了she; chalkboard 被改为了board.不但句子显得更加生动活泼不刻板，信息量也比原来要多了。