Chỉ sự tăng lên :

   gradual rise

   increase, rise, go up.

   surge, leap

   shot up, rocket

   decidedly upward (luôn tăng)

Chỉ sự giảm xuống :

   go down, fall back (by), decrease, drop

   sharp drop, plunge

   plummet

Chỉ sự đều đều :

   fairly steady, stable, hover around, remain constant

   steady grow, increase steadily, decrease steadily...

Chỉ sự thất thường :

   erratically, fluctuation

Một số cấu trúc hay :

plunged dramatically (giảm thê thảm)

sharp turnaround, dramatic turnaround

went up/down widely

the trend was obvious upward

rocketing by almost 400%

be off their September peak (rơi xuống khỏi đỉnh của nó vào tháng 9)

the most striking feature of the chart is that...

Câu mở bài :

The criticism that .... has some justification.

The debate about.... has been raging for almost  (as long as) ...

Câu mở đoạn :

Some people say....

Others, myself included are of the opinion that

In one group are those who believe...

In other one group are those who feel...

The answer, I feel, lies somewhere in the middle.

Unfortunaly, there is a downside to...

Một số cấu trúc khác :

Admittedly,....

It is obviously difficult to....

It is probably foolish to... but...

to redress the imbalance

to be frown upon by....

For myself...

For my own part,....

Many people object to..., citing....

There is an enormous pressure to...

Nowadays,...

The matter is not just in the hand of...

... has as much a part to play as ... in doing sth

The main advantage of .... is that

.... like everything has two sides.

In such circumstances .... tend to....

First of all, .... Morever,....

Take ...., for example. (write about it)

alternative method

And the trend is to continue, if not to get worse.

... is not a new phenomenon.