说明原因的句式:

　　1) There are some/two/many good reasons for.../to do...

　　2) We have two good reasons for...

　　3) The reason for ... is that + 从句

　　4) Among the most convincing reasons given by people for..., one should be mentioned...

　　5) One may think of the trend as a result of...

　　6) The change in... largely results from the fact that...

　　7) There are several causes for this significant growth in... irst...

　　8) A number of factors could account for the ....

　　9) It is no simple task to give the reason for ...

　　10) The cause of /reason for higher prices was an increase in demand.

　　11) Because/As/Now that/Since the demand has increased, the prices are higher.

　　12) An increase in demand causes/results in/leads to/produces higher prices.

　　13) The demand has increased.

　　14) Therefore,/As a result,/For this reason,/Because of this,/Consequently, the prices are higher.

　　15) If there is an increase in demand, then prices rise./go up. /boost./are higher.

　　16) Different people look at...in different ways...