В каких случаях пишутся when и while?

Закончите предложения 1) I was reading while ... 2) my friend was riding his bike while ... 3) They were watching television while ... 4) We were playing hockey while ... 5) She was having lunch while ... 6) You were listening to music while ...

В каких случаях пишутся are, am, is? (Present simple passive) В каких случаях пишутся was, were? (Past simple passive)

While I came into the classcroom today, While I was eating dinner last night, While I was cleaning my teeth last night, While I was doing my homework last night, When I left the house this morning,

1) В каких случаях употребляется the present perfect? 2) В каких случаях употребляется the present perfect progressive? 3) В каких случаях the present perfect употребляется вместо the present perfect progressive?

Заполните пробелы глаголами в формах простого прошедшего или прошедшего длительного времени: 1. They (have) tea when the doorbell (ring) 2. Father (smoke) his pipe while mother (read) a magazine. 3 While he (mow) the tawn it (Start) torain. 4.