I ________ go to the store today; I have too much work.
can't
You ________ go to Mercadona last Friday.
could
We ________ read the magazine online last week.
could
I ________ find the ebook I was looking for online yesterday.
could
You ________ send me an email when you're ready.
can
She ________ visit the website yesterday; it was under maintenance.
couldn't
I ________ read the newspaper online anytime I want.
can
We ________ watch the news on the website last night.
could
They ________ read the dictionary before the test.
can
He ________ send a text message because his phone battery died.
couldn't
You ________ download the encyclopedia on your phone.
can
She ________ send me an email last night because her phone was off.
couldn't
They ________ come to my house last Wednesday because they had to work.
couldn't
I ________ play online games with my friends last weekend because the internet was down.
couldn't
I ________ send the letter because I didn't have a stamp.
couldn't