This paper was followed by many others on diverse topics - on rain and dew and the origin of springs, on heat, the colour of the sky, steam, the auxiliary verbs and participles of the English language and the reflection and refraction of light.
The last two are sometimes indicated by particles or auxiliary verbs; but these are generally dispensed with if the meaning is sufficiently plain without them.
auxiliary verbs与发音含义,同义词,反义词,翻译,刑和更多的