托福寫(xiě)作句型:假設(shè)條件句怎么寫(xiě)

　　托福寫(xiě)作句型:假設(shè)條件句怎么寫(xiě)

　　It is essential for young people to have the ability to plan and organize.

　　If a high school student is about to leave school soon, it is necessary for him to have a most suitable plan before the graduation ceremony begins.

　　Teachers should give students homework everyday.

　　If teacher had been checking the students' progress with daily homework assignments, they might not have failed the test.

　　過(guò)去的虛擬，把反面的例子變成正面的評(píng)論

　　if sb had done, sb might/would have done

　　Traveling alone is better than travelling with a companion.

　　But for the assistance from a companion, travelers would be exposed to more dangers on the way.

　　現(xiàn)在或?qū)?lái)的情況：but for sb/sth, sb would do sth

　　過(guò)去的情況： but for sb/sth, sb would have done