$\text{5 was arriving => arrived}$
_ Thì quá khứ tiếp diễn : S + Was/were + Ving
_ thường thì : When + Quá khứ đơn, S + Was/were + Ving
$\text{6 too much TV => TV too much}$
_ V + N + too much : làm việc gì quá nhiều
$\text{7 was learning => had learnt}$
_ Thì quá khứ hoàn thành : S + had + PII
$\text{8 was => had been}$
_ Thì quá khứ hoàn thành : S + had + PII
_ Sau been + Ving