两题英语题，初一的

(1)helmet ['helmit]
n. 头盔
例句与用法:
1.A cloth band or scarf wrapped around the crown of a hat or sun helmet.
头巾缠绕在礼帽或遮阳帽帽冠周围的布条或三角巾
2.A medieval light helmet with a neck guard and movable visor.
头盔中世纪有护颈和活动护面的轻便头盔
3.Jerry: I never had a beard. I kept my hair inside the helmet.
杰端：我以前是从不留胡子，我头发是在头盔里。
4.These policemen wear helmets to protect them.
这些警察戴着头盔保护自己。

词形变化:
动词过去式:helmeted 过去分词:helmeted
过去分词:helmeted 现在分词:helmeting
现在分词:helmeting 第三人称单数:helmets

英英解释:
名词 helmet:
1.armor plate that protects the head
2.a protective headgear made of hard material to resist blows

(2)babysit ['beibisit]
v. 照看婴儿
vi. 临时代人照看婴儿