it help a lot in doing sth有这种用法吗

it help a lot in doing sth有这种用法吗 有help doing sth 这种用法吗? 有help sb doing sth这种用法吗 有it is a waste of time doing sth 这种用法吗? 有want doing sth这种用法吗 有because doing sth.这种用法吗? help with doing 有这种用法吗? 有after sb doing sth 和 We in groups discuss sth...这种用法吗? have no mean in doing sth有这种用法么? help sb doing sth有这种说法吗? be just doing sth 有这种用法吗 notice sth/sb be doing 这种用法有吗?