1.理解沒錯.但是如果從句是客觀真理,即使主句是過去時,從句還用一般現(xiàn)在時.The teacher told us that the earth goes areound the sun.
2.主句是現(xiàn)在時,從句是任意時態(tài).也就是說從句可以是過去,將來,現(xiàn)在,進行等.
I don't know if he will come tomorrow.I don't know if he came yesterday.
3.Neither Jim nor Tom is a student.
兩者都不,用neither...nor...,后面謂語動詞就近原則,也就是和neither后面的詞一致.因此用單數(shù).neither...nor...本身就是不的意思,因此不要再加not..what does the Great Wall look like？ The kid asked his mother，這句難道從句要用過去完成時？.what does the Great Wall look like？一般現(xiàn)在時， 改從句為過去時。其實要改時態(tài)的話， 只要把從句的第一個動詞改為過去式就可以了。 這句looks 改為looked will-would is -was have-had plays/play- played