一、關(guān)于連系動詞后接副詞作表語的問題
連系動詞后通常可接形容詞作表語，一般不接副詞：
誤：His English is very well. 他的英語很好。(可將well改為good)
誤：Be carefully. 小心點。(應(yīng)將carefully改為careful)
誤：The soup tastes nicely. 這湯味道不錯。(應(yīng)將nicely改為nice)
但是，有時連系動詞后也可接副詞作表語，不過這主要限于in, on, off, out, away, behind, up, down, over, through, around, round, below, inside, outside 等少數(shù)副詞小品詞以及here, there, upstairs, downstairs等少數(shù)表示地點或方位的副詞：
Mother wasn’t in last night. 母親昨晚不在家。
The meeting was over at five. 會議五點結(jié)束。
Come along. The taxi is outside. 來吧，出租車在外面。
Mother is downstairs waiting for you. 母親在樓下等你。
二、關(guān)于連系動詞后接不定式的問題
(1) 連系動詞be后根據(jù)情況可自由地接不定式作表語：
My dream is to be a scientist. 我的夢想是當一名科學家。
All I could do was to wait. 我只能等。
My plan was to go from London to Paris. 我計劃從倫敦去巴黎。
I was to have seen Mr Kay. 我本要去見凱先生的。
(2) seem, appear, prove, continue, turn out, get, grow, come 等連系動詞后也可接不定式(尤其是to be)作表語：
She always seems to be sad. 她常常顯得很憂傷。
My advice proved to be wrong. 我的意見證明是錯的。
She appears to have many friends. 他好像有很多朋友。
The weather turned out to be fine. 天氣結(jié)果很好。
Circumstances continue to be favorable. 情況仍然是有利的。
He has grown to like studying English. 他漸漸喜歡學英語了。
【注】若所接不定式為to be，通常可以省略。不過，若其后接的是表語形容詞，則to be通常不宜省略。另外，連系動詞look后能否接to be似乎尚有爭論，不過，在現(xiàn)代英語中接to be的現(xiàn)象已較普遍。
(3) sound, smell, feel, taste, become等連系動詞后通常不能接不定式：
誤：These oranges taste to be good. (應(yīng)去掉to be)
誤：The roses smell nice. (應(yīng)去掉to be)
(4) 有的連系動詞后接的從句可用不定式來改寫：
It seems that that she’s right. / She seems to be right. 她似乎是對的。
It appears that you have made a mistake. / You appear to have made a mistake. 似乎你弄錯了。
連系動詞后通常可接形容詞作表語，一般不接副詞：
誤：His English is very well. 他的英語很好。(可將well改為good)
誤：Be carefully. 小心點。(應(yīng)將carefully改為careful)
誤：The soup tastes nicely. 這湯味道不錯。(應(yīng)將nicely改為nice)
但是，有時連系動詞后也可接副詞作表語，不過這主要限于in, on, off, out, away, behind, up, down, over, through, around, round, below, inside, outside 等少數(shù)副詞小品詞以及here, there, upstairs, downstairs等少數(shù)表示地點或方位的副詞：
Mother wasn’t in last night. 母親昨晚不在家。
The meeting was over at five. 會議五點結(jié)束。
Come along. The taxi is outside. 來吧，出租車在外面。
Mother is downstairs waiting for you. 母親在樓下等你。
二、關(guān)于連系動詞后接不定式的問題
(1) 連系動詞be后根據(jù)情況可自由地接不定式作表語：
My dream is to be a scientist. 我的夢想是當一名科學家。
All I could do was to wait. 我只能等。
My plan was to go from London to Paris. 我計劃從倫敦去巴黎。
I was to have seen Mr Kay. 我本要去見凱先生的。
(2) seem, appear, prove, continue, turn out, get, grow, come 等連系動詞后也可接不定式(尤其是to be)作表語：
She always seems to be sad. 她常常顯得很憂傷。
My advice proved to be wrong. 我的意見證明是錯的。
She appears to have many friends. 他好像有很多朋友。
The weather turned out to be fine. 天氣結(jié)果很好。
Circumstances continue to be favorable. 情況仍然是有利的。
He has grown to like studying English. 他漸漸喜歡學英語了。
【注】若所接不定式為to be，通常可以省略。不過，若其后接的是表語形容詞，則to be通常不宜省略。另外，連系動詞look后能否接to be似乎尚有爭論，不過，在現(xiàn)代英語中接to be的現(xiàn)象已較普遍。
(3) sound, smell, feel, taste, become等連系動詞后通常不能接不定式：
誤：These oranges taste to be good. (應(yīng)去掉to be)
誤：The roses smell nice. (應(yīng)去掉to be)
(4) 有的連系動詞后接的從句可用不定式來改寫：
It seems that that she’s right. / She seems to be right. 她似乎是對的。
It appears that you have made a mistake. / You appear to have made a mistake. 似乎你弄錯了。