Basic: go up, rise
Better: increase, grow
Advanced: surge, soar, skyrocket
Gradual: climb, edge up
Recovery: bounce back, recover
Basic: go down, fall
Better: decrease, drop
Advanced: plummet, plunge, slump
Gradual: decline, dip
Stabilize: level off, plateau
Big change: dramatic, sharp
Small change: slight, modest
Quick: rapid, sudden
Slow: gradual, steady
Significant: considerable, substantial
I strongly believe that...
It is widely accepted that...
There is no doubt that...
From my perspective...
I am convinced that...
Furthermore,...
Moreover,...
In addition,...
What is more,...
Another key point is...
However,...
Nevertheless,...
On the other hand,...
In contrast,...
Conversely,...
For example,...
For instance,...
To illustrate,...
A clear example is...
This can be seen when...