screen time

screen time

1. Vocabulary technology

   • verbs
     • zip a file save a document browse the internet plug sync device post an update stream a video extract files connect to wifi upgrade 
   • nouns
     • headset charger at @ simbol webcam plug power lead protective case wireless router usb port

2. ability in the past

   • to talk about ability generally in the past we use could or couldnt. to talk about ability  at specific moments in the past, we use was/were able to + infinitive, or in + gerund. to talk about a lack of ability at specific moments in the past, we use wasnt/werent able to

3. Necessity

   • when we use neednt have to , it means that  someone did something that wasnt thruly neccesary. when we use didnt need to , it often means that  someone didnt do something  because its wasnt neccesary.

4. obligation, permission and prohibition

   • to express obligation or necessity, we can use have to or must. to say something is or isnt a good idea we can use should. to express no obligation or necessity, we can use dont have to or dont need to. to express permisionwe can use let to say that something is not permitted we use dont allow to