英语中时态问题：为什么此句中主语谓语动词用was,而that从句中用的是is?望高手解答!ThelatestwasapanelfromtheNationalAcademyofsciences,enlistedbytheWhiteHouse,totellusthattheEarth'satmosphereisdefin

Question

英语中时态问题：为什么 此句中主语谓语动词用was,而that 从句中 用的是is?望高手解答!
The latest was a panel from the National Academy of sciences,enlisted by the White House,to tell us that the Earth's atmosphere is definitely warming and that the problem is largely man-made.

Answer 1

主句谓语一般情况下可以决定从句时态,如果主句是过去时态,从句常用过去的某种时态,但是如果从句是一个客观的真理或事实,仍然用一般现在时态,这里就属于这种情况.如：The teacher told us that the earth moves around the sun .