在雅思寫作的四大評(píng)分標(biāo)準(zhǔn)當(dāng)中，連貫性與銜接性是其中的一項(xiàng)評(píng)分標(biāo)準(zhǔn)，連貫性與銜接性其中一方面就是用連接手段（即連接詞）來實(shí)現(xiàn)的。連接詞本身是非常繁瑣的知識(shí)，在教授連接詞時(shí)也會(huì)遇到很多困難，那么學(xué)連接詞首先把連接詞詞性掌握并掌握各詞性的用法，學(xué)連接詞就簡便得多。連接詞大體可分為四種詞性：連詞，副詞，介詞和短語，它們各自的用法又不一樣。

連詞
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如but, and,后接句子，連接并列句時(shí)前面逗號(hào)可有可無。當(dāng)然連詞也可放句首，這一點(diǎn)在考官范文里有很多體現(xiàn)。
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例：In the past, populations were partly regulated by frequent war and widespread disease, but in recent years the effects of those factors have been diminished. (并列句中的連詞)
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段落開始： But how should it be achieved (連詞放句首)

介詞
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如before, despite：后接名詞或動(dòng)名詞
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例：Before talking about the essential role of death penalty, you have to think about the meaning, and the purpose, of any kind of punishment.

副詞
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副詞連接并列句，前面用句號(hào)或分號(hào)，后面用逗號(hào)（當(dāng)然，如果副詞前用句號(hào)，那就是另起一句了，不稱之為并列句）
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例：In many places today, children start primary school at around the age of six or seven. However, because it is more likely now that both parents work, there is little opportunities for children to stay in their own home up to that age.( 副詞另起一句)
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The crime rate is increasingly high; therefore, the government needs to enforce more laws to curb this situation. ( 副詞在并列句中)

短語
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如on the contrary, in addition：用法和副詞用法完全一樣
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例：They feel this is one area of life where they have the right to make decisions for themselves. For that reason, it would seem that the best approach would be work by persuasion rather than compulsion.
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The government plays a crucial role in scientific research; on the other hand, private companies hold certain advantages in conducting scientific research. (短語在并列句中)
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掌握連接詞的四大詞性及用法以后，連接詞的教學(xué)和運(yùn)用就容易展開。我們可以參看考官范文，看看各類關(guān)系的時(shí)候考官如何使用連接詞，使文章凸顯出來。

因果關(guān)系
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根據(jù)詞性及用法可歸結(jié)于:
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because / since/ as / for, so (連詞),
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because of/ due to / owing to/ as a result of (介詞)
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for that reason/as a result/ therefore/ accordingly (短語和副詞)
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例：I think the amount of waste produced is also as a result of our tendency to use sth once and throw it away. （可代替詞匯because of/ due to / owing to）