托福考试中的语法部分经常会有一些不显眼的意思相近小词作为考点，归纳一下考前必浏览一下的几个小词组群，必会让你事半功倍。

like / as

like是介系词，必须接名词。

as是连接词，必须接子句。

She singslike an angel.

She singsas an angel does.

due to / because of / because / for / since / as

due to接受词，通常放在 be动词之后。

His absence wasdue toillness.

because of因为有介系词，必须接受词。

He canceled his reservationbecause ofhis cold.

because作连接词，叙述理由，要接子句。

I don ’ t go to schoolbecauseI had a bad headache.

for作连接词，推测前句的理由，要接子句，但不能放在句首。

He was glad to go,forhis grandmother had been good to him.

since是连接词，语意没有 because那么强，置于句首。

Since you are going to go to the post office, would you mail this letter ?（既然你要去邮局，可以帮我寄这封信吗？）

as作连接词，语意比 since更弱。

As it was getting dark, we made for home.

compareto / comparewith

compare to （比喻、比作），作抽象事物之间的比较，而 compare with则作一般事物的比较。

I shouldcompareyour eyestodiamonds.

我应该把你的眼睛比喻成钻石。

We can ’ tcomparediamondwithjade.

我们无法比较钻石和翡翠。

imply / infer

imply是暗示、暗寓的意思 ， infer则是由暗示、暗寓来推测结论。

The guest speakerimpliedthat the scholar ’ s theory was wrong.

The fact may beinferredfrom his words.

watch / look / see

watch是看着动态的景物， look是看着静态的景物， see则广义地用于看见人或物

I amwatchinga baseball game/TV.

Lookat the picture on the wall.

I canseesome roses in the vast.

scarcely /rarely /seldom / seldom, if ever / hardly ever

scarcely, rarely, seldom和 hardly放在句首时，主词和 be动词或助动词要倒装。

seldom和 rarely是“很少”的意思，通常置于动词之前。

She hadseldom [or rarely]written to her friend.

seldom if ever 和hardly ever是副词片语，意思皆为“几乎不… . ”。

Heseldom,if ever,drinks.

Hehardlyeverdrinks.

kind of

this kind of+单数名词=these kind of +复数名词，都指只有一个种类。 these kinds of才指有很多种类

This kind of manis dangerous. =These kind of menare dangerous. （这种人很危险。）

These kinds oftrees are easy to grow. （这些品种的树很容易长。）

by / till

by表示未来将完成的某一时间界限。

—— ｜——————｜————I will finish my paperbytomorrow.

现在 完成的时点

till是表继续动作的终点

∨∨

ˉˉˉˉˉˉˉˉˉˉ继续ˉˉˉˉˉˉˉˉˉˉˉˉˉˉI will be heretilltomorrow.

现在——————→

线段终点