1.由and和both...and连接的并列成分作主语时，其谓语动词通常要用复数
如：
Christianity and Islam are two different religions.基督教与伊斯兰教是两种不同宗教。
Both handle and bolt are automatically deadlocked against turning.把手和插梢都自动锁死不能转动的。
注：当由and连接的两个并列主语受each, every, no的修饰时，谓语用单数。如：
Every boy and (every) girl likes the book.每个男孩女孩都喜欢这本书。
No desk and (no) chair was seen in the room.房间里不见桌椅。
2.由or, nor, either...or, neither…nor, not only…but also, not…but等连接的并列成作主语时，谓语动词通常与最靠近的主语保持一致(即遵循就近原则)。
如：
He or I am wrong.不是他错了，就是我错了。
Either you or he has taken it.不是你拿了就是他拿了。
Not only the students but also the teacher wants to go.不仅学生想去，老师也想去。
注意这类句型的疑问句形式：
Were you or he there?当时是你还是他在那儿?
Are either you or he to blame?是怪你还是怪他?
注：在非正式文体中，个别结构(如neither…nor)连接主语时，谓语可用复数。如：
Neither his father nor his mother have [has] come.他的爸爸和妈妈都没来。
3.由as well as, as much as, rather than , more than, no less than等连接的并列成分作主语时，谓语动词通常与前面一个主语保持一致。
如：
The teacher as well as the students has read it不仅学生读过它，老师也读过。
The teacher rather than the students is to blame.应受责备的是老师而不是学生。
