1.this用作形容词作“这”解时,用于修饰表示在时间、地点、想法上更接近讲话者的事物或人,也可与包括现在的日子或一段时间的词语连用。
2.“this+one's+n.”是一种简洁的文体,有强调意味; “this+基数词+时间名词”表示一段时间。this可与of短语连用,后接名词性物主代词或名词所有格。

用作定语
▲～+n.
 Mosquitoes are extremely abundant in this dark wet place.这个阴暗潮湿的地方蚊子非常多。
They have built three nuclear power stations this year.他们今年建造了三座核电站。
Come here and look at this picture.过来看这幅画。
There was this peculiar man sitting opposite me on the bus.在公共汽车上有个奇怪的男人坐在我对面。
This his journal is worth reading.他写的这本日志值得一读。
He was on night shift this six days.这六天来他都上夜班。
This little daughter of his is very clever.他的这个小女孩真聪明。
This book of Joe's is very amusing.乔的这本书非常有趣。

1.this用作代词可用以指叙述中的人或事物,即指前面提到过的人或事物或下文提及的事物; this一般作主语时才指人; 在电话用语中, this用来指代自己。
2.当陈述部分的主语是this时,附加疑问部分的主语须用it。

this and that〔this, that and the other〕
形形色色的东西various things
We were sitting there talking this and that.我们坐在那儿谈这谈那。

Would you give her these?你要把这些给她吗?
What I have to say to you is this; if you don't break off drinking for good, you'll be sorry pretty soon.我必须向你说明的是:如果你不彻底戒酒的话,你很快就会后悔的。
I am one with you on this.在这一点上,我和你的意见是一致的。
This is my wife.这是我妻子。
Hello.This is John.嗨,我是约翰。
This is the man you are going to see, isn't it?这就是你要见的那个人,对吗?
I thought he'd have got back before this.我以为他会在这之前回来的。
I shall leave this on the 21st.我21日离开这里。

［同义词］ adj. & pron.  that
［词源］＜古英语this(这个,这)