请否定词+or / and / either有何区别。如:I couldn’t run fast or play basketball well.We didn’t have a library, and there weren’t any computer rooms at all.There was no gym either!
...tended.2) It seems crucial that more activities are to be attended.对于词crucial,其后的从句一定要用should+动词的虚拟形式吗?第二句的表达是否正确?类似的比如important, significant等等,从句是否都要用should的虚拟形式?