七、部分过去式和过去分词不规则变化的动词

broadcast (broadcast, broadcast) 广播

flee (fled, fled) 逃跑

forbid (forbade, forbidden) 禁止

forgive (forgave, forgiven) 原谅

freeze (froze, frozen) 结冰

hang (作“绞死”讲，是规则的;作“悬挂”讲，hung)

lie (作“说谎”讲时，是规则的;作“位于”讲时，lay，lain)

seek (sought, sought) 寻求

shake (shook, shaken) 发抖

sing (sang, sung) 唱歌

sink (sank, sunk/sunken) 下沉

spread (spread, spread) 传播

swim (swam, swum) 游泳

tear (tore, torn) 撕碎

weave (wove, woven) 编织

八、意义相近的词辨析

check / examine/ test

receive / accept

destroy /damage

celebrate/ congratulate

wear / dress

九、注意形容词变名词时的拼写变化

long—length 长度

wide—width 宽度

high—height 高度

strong—strength力量

十、以-ic结尾的动词，应先把-ic变为-ick，再加ing或ed

picnic (picnicked, picnicking) 野餐

clinic

panic

十一、个别名词的复数拼写

Germans humans Romans

gulfs roofs cliffs handkerchiefs chief belief proof

heroes ，potatoes ，tomatoes

stomachs medium-media bacterium-bacteria

crisis-crises basis-bases analysis- analyses

criterion-criteria mouse-mice

species series means