1 Relative pronouns(关系代词)
Please welcome Mike Bowers, who is going to talk to us about how to look after your home.
These are dangerous if you live in a flat which is in a large high-rise buildings.
Find someone that can check on your home while you’re away.
Store away any objects that could become damaging missiles.
This is your home,the place where you keep your most treasured possessions.
Programme them to come on at times when you would normally be home.
You’re a person whose job involves a lot of travel.
He lives in an old house,whose roof needs repairing.
例:He lives in an old house,of which the roof needs repairing.
He lives in an old house,the roof of which needs repairing.
? why在the reason或reasons后面：
There are often very good reasons why one house is burgled and another is not.
2 Defining attributive clauses(限定性定语从句)
Maybe there’s a neighbour (that) you can ask.(neighbour是从句中ask的宾语)
In the evening,a house that’s very dark can really stand out.(house是从句中的主语，此时that不可以省略。)
3 Non-defining attributive clauses(非限定性定语从句)
句1：I applied to the university,which is located in the center of the city.(非限定性)
句2：I applied to the university which is located in the center of the city.(限定性)
The burglars got in through the kitchen window,that the owners had forgotten to shut.×
The burglars got in through the kitchen window,which the owners had forgotten to shut.√
Mary has fallen in love with Jerry,which all of us know.此句中，which指代整个前半句的内容。
You may have a neighbour that you can rely on.
I was successful in obtaining a place at any of the universities to which i applied.
My boss,for whom i have worked for over 30 years,has decided to retire.