have had the experience of doing

and / or

used to give an explanation or reason / used to give an emphasis or a special sense

to exceed; to surpass / to be too much; to be excessive

it is better to; it is preferable to

expresses reason or cause; because / used to give a reason or explanation for something

must do; have to do

indicates likelihood; probably; seems like

in front (of) / before (in time)

after doing