`color {violet}{#0209}`

`1` We catch the bus every morning.

`->` dhnb: every moring `->` htd

`->` htd: S + V(es/s/inf)

`->` We dùng V-inf

`2` Each lesson is forty - five minutes.

`->` Diễn tả `1` sự thật hiển nhiên `->` htd

`->` S + is/am/are + N/adj

`3` Linda is riding a bike at the moment.

`->` dhnb: at the moment `->` httd

`->` httd: S + is/am/are + V-ing

`4` English is on of the foregin languages at school.

`->` Diễn tả `1` sự thật hiển nhiên `->` htd

`->` htd: S + is/am/are + N/adj

`5` Are you studying maths at school now?

`->` dhnb: now `->` httd

`->` Is/Am/Are + S + V-ing