Modals could & should

Could + verb expresses:

• GOOD IDEA

• BAD IDEA

• POSSIBILITY

Should + verb expresses:

• GOOD IDEA

• BAD IDEA

• POSSIBILITY

Shouldn't + verb expresses

• GOOD IDEA

• BAD IDEA

• POSSIBILITY

Should & Could are used to:

• give news

• give advice

• give homework

You should buy her some flowers express advice in the present or past?

She could be nicer to her mom expresses advice in the present or past?

They should have arrived on time.

• present

• past

We could have eaten the salad instead.

• present

• past

Transform into past: I could call him.

Transform into past: Chris should drink more water.