Main Points
Some adjectives used after link verbs can be used alone or followed by a prepositional phrase.
Some adjectives must be followed by particular prepositions.
Some adjectives can be followed by different prepositions to introduce different types of information.
要点
一些用在系动词之后的形容词可以单独使用，或后接介词短语；有些形容词必须后接特定的介词；有些形容词可以后接不同的介词，以引出不不同的信息。
1. When you use and adjective after a link verb, you can often use the adjective on its own or followed by a prepositional phrase. 一些用在系动词之后的形容词可以单独使用，或后接介词短语。
He was afraid. 他害怕了
He was afraid of his enemies. 他害怕敌人。
2. Some adjectives cannot be used alone after a link verb. If they are followed by a prepositional phrase, it must have a particular preposition. 有些形容词在系动词之后不能单独使用。如果后接介词短语，则必须用特定的介词。
I’ve always been terribly fond of you.
He is unaccustomed to the heat.
3. Some adjectives can be used alone, or followed by a particular preposition. 有些形容词可单独使用，或后接特定的介词。
— used alone, or with ‘of’ to specify the cause of a feeling
— 单独使用，或后接“of”，以具体说明引起某种情感的原因
They may feel jealous of your success.
I was terrified of her.
— used alone, or with ‘of’ to specify the person who has a quality
— 单独使用，或后接“of”，以具体说明具有某种特质的人
That was clever of you!
I turned the job down, which was stupid of me.
— used alone or used with ‘to’, usually referring to:
— 单独使用，或后接“to”，通常指：
similarity: close equal identical related similar
marriage: married engaged
loyalty: dedicated devoted loyal
rank: junior senior
My problems are very similar to yours.
He was dedicated to his job.
— used alone, or followed by ‘with’ to specify the cause of a feeling
— 单独使用，或后接“with”，以具体说明引起某种情感的原因
I could never be bored with football.
He was pleased with her.
— used alone, or with ‘at’, usually referring to:
— 单独使用，或后接“at”，通常指：
Strong reactions: alarmed amazed astonished shocked surprised
Ability: bad excellent good hopeless useless
He was shocked at the hatred they had known.
She had always been good at languages.
— used alone, or with ‘for’ to specify the person or thing that a quality relates to
— 单独使用，或后接介词“for”，以具体说明与某种特质相关的人或事物
It’s difficult for young people on their own.
It was unusual for them to go away at the weekend.
4. Some adjectives can be used alone, or used with different prepositions. 有些形容词可以单独使用，或后接不同的介词。
— used alone, with an impersonal subject and ‘of’ and the subject of the action, or with a personal subject and ‘to’ and the object of the action.
— 在非人称主语之后单独使用，后接“of”及行为的主语；或在人称主语之后单独使用，后接“to”及行为的宾语。
It was rude of him to leave so suddenly.
She was rude to him for no reason.
— used alone, with ‘about’ to specify a thing or ‘with’ to specify a person
— 单独使用，后接“about”，具体说明某事；后接“with”，具体说明某人
She was still angry about the result.
They’re getting pretty fed up with him.
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