在多年的写作教学中，笔者发现很多雅思和新托福考生在写作中无法灵活运用句子结构，无法实现句子结构的多样化运用。很多考生为此费尽心思，不知道该从何处着手练习，使文章中的句子能够多样化。事实上，我们可以采用不同的句子开头使句子多样化。专家认为，写作的时候不应该总是用“subject-verb-object”的结构顺序，而应该尽量用不同的方式展开一个句子。不同的句子开头既可以美化句子，同时也能使句子与句子之间自然过度，衔接自然，以免过于依赖过渡词。在雅思和新托福考试中，写作考官对句子结构的多样化也是非常重视的。

【副词开头】

(1)副词修饰全句

Luckily, he didn't know my phone number; otherwise, he would bother me.

Incredibly, Helena got straight A in her school report this semester.

Interestingly, cats and dogs can hardly get along well in a house.

修饰全句常用的副词有：obviously, undoubtedly, apparently, fortunately, clearly, unfortunately, incredibly, luckily, unluckily, surprisingly, frighteningly等。

这些副词大多数表示说话人对全句的看法，在意思上相当于“It is ...形容词 that ...”。

比如：

Obviously, he is nervous about the test.

=It is obvious that he is nervous about the test.

Unfortunately, he tripped over and fell in the mud.

=It is unfortunate that he tripped over and fell in the mud.

(2)强调副词

Hurriedly, the man drew me a scratch map to show me the direction.

Dangerously, the drunkard sped down the street.

Slowly and gently, snowflakes were drifting down from the sky.

(3)副词表示某一地域或某一领域

Geographically, Canada is the biggest country in the world.

Financially, she is independent, but emotionally she is dependent.

【插入语开头】

用插入语开头，表示说话人的态度，或使句子的意思更加准确：

Strangely enough, Jennifer does not enjoy sunshine and beach.

Generally speaking, winter in Vancouver is gloomy.

类似的插入语有：no wonder, no doubt, in other words, in my opinion, in conclusion, in fact, as a matter of fact等。

【形容词和形容词短语开头】

用形容词、并列形容词或形容词短语开头，修饰句子的主语，表示主语的特征或状态：

Frantic, the young mother rushed out the door with the baby in her arms.

Tasty and crisp, potato chip is a favorite snack for both children and adults.