helping verb

n.

助动词；

Structural Analysis of English and Spanish
grammar tales a verb for herb
Use a comma between the names of a city and a state and between a city and a country.
An Investigation of the Cryptobiotic Community from Sandstone Cliffs in Southeast Ohio
A Two-Year Survey of the Algal Community in a Woodland Stream from Southeastern Ohio
Dialect Passages and Text Constitution in Aristophanes' "Acharnians"
Diabetic Neuropathy
Negotiating Rural Tourism Development at the Local Level : A case study in Pisece, Slovenia
Charles Dickens' work to help establish Great Ormond Street Hospital
Helping hand or heavy hand? Foreign aid, regime type and domestic unrest