There be句型的主謂一致
當be后面的名詞是可數名詞單數或不可數名詞時,謂語用單數is(was);當be后面的名詞是可數名詞復數時,謂語用復數are(were)。如:
There is a river at the foot of the hill.(山腳下有條小河。)
There are two watermelons under the desk.(桌子下有兩個西瓜。)
如果be后面是多個名詞并列,be應與靠近它的'名詞的數保持一致。如:
There is a river and many trees at the foot of the hill.(山腳下有一條小河和許多樹。)
There is a basketball and two watermelons under the desk.(桌子下有一個籃球、兩個西瓜。)